Yes, I've seen a Leather Terra Cotta L-Type interior before in a junkyard, so they do exist. As mentioned, the Leather tends to lean towards brown as it starts to age & darken. It's definitely not Maroon or Burgandy. However, I do feel that Maroon is what replaced TC in the 84 model year, since Black & Blue was retained. And the North America interiors only came in 4 colors during it's 5 year run (Black, Terra Cotta, Blue, Maroon).
I agree, the best thing that he can do now, is to find a spare set of seats that he can have made up. AND.... If possible on his current seats, find a small sample of leather that has not been darkened over time, this way the correct & original shade of the TC leather can be recreated w/ dye.
This is what Jim King did about 3 years ago when a bunch of us w/ the 84 - 86 Maroon interiors did our leather rim steering wheel recovers @ American Stitches in Texas. Jim had to find a small sample of Maroon leather that had not been darkened (our Maroon Leather's are NOTORIOUS for turning dark over time) and sent them a sample.
TC leather steering wheels. Nope.... ALL North America MKII steering wheels had the leather wrap on them, as evidence in Doug's picture above. Most of the time, the leather is in a advanced stage of rot, or as in Supraa_luva's case, the leather & the foam padding has been completely removed. I've also seen about 4 TC steering wheels that still had the original leather cover on them, ONE OF THEM was still in a 9 out of 10 condition!!!! No wear or rot on it. I pulled it off & sold it to someone in the midwest about 6 years ago (should have kept that wheel). Anywho, I currently have a TC steering wheel that I need to get redone, but the leather is in a advanced state of rot, so one of these days I'll see if I can head up another GP for leather cover refinishes @ American Stitches (we're probably about due for one now).
Leather cover replacement. This is where things get a bit technical.
American Stitches WILL try & go the extra mile to do a correct & proper leather skin replacement on our steering wheels. This includes trying to recreate the original stitching pattern, the seam locations on the leather itself (will explain that in more detail in a minute) AND, underneath the leather wrap, they will replace the foam padding that is inbetween the leather & the wheel rim itself (yep, why do you think the leather is a bit on the squishy side when you grab it). On our original steering wheel GP, we goofed on the thickness of the padding needed, thus when you grab the current set of redone wheels, the thickness of the leather seems a little smaller than the original ones. When we do the next set of wheels, we will have to ask for thicker padding underneath.
Seam locations. This is where it gets even more interesting. When we did the Maroon steering wheels (I had 1 Maroon wheel & 1 Black wheel done), we of course used the 84 - 86 steering wheels & the original leather stitching pattern was copied & digitized for future reference. No other MKII steering wheel was used, this includes the 82 - 83 wheels. On the latter 84 - 86 wheels, you will notice on the wheel rim TWO seam locations that are in line w/ both wheel spokes that are at the 5:00 & 7:00 positions. BOTH of those seam locations were recreated on our redone wheels. On the 82 - 83 wheels, those seam locations are NOT in the same place underneath the spokes, they are located on the sides at the 9:00 & 3:00 positions. So already this is a bit of a problem.
At this point, I need to do 2 things. 1. I need to send to AS, both a spare Black 82 - 83 wheel that I have, and a spare TC wheel that I have. Both need to be recovered & 1 of them can be used as the stitching/seam location template that they can copy & digitize for the 82 - 83 wheel pattern. 2. I have a ratty looking pleather console lid that looks horrendous on the top, but underneath, where it wrapped into the metal part of the console lid, the pleather & the original shade of Terra Cotta is still in brand condition. I'm going to have them use that as a color sample & hopefully they will get some leather made up & dye'd.
So yeah, it can be done, but there are a few minor technicalities that I need to deal with first.
One other thing that I forgot to mention. American Stitches will ALSO replace the leather on our 5-speed shift knobs. Maroon & Black can easily be redone at the moment. Blue & Terra Cotta, they will need color samples first.
If you want, I can bring 1 or both of my steering wheels w/ me to the Baxters meet & you can check out their handywork. I had a Maroon & a Black wheel done. LMK!!!!
I also need to find the AS website. Will have to do this later tonight.