Welcome aboard. Unfortunately, there is virtually nothing in the way of new reproduction trim for these Supras except what we organize ourselves. You need to always be ready to jump on the group buys and batch runs like these above. Don't hesitate because we tend to get one batch done and then its years before there's enough demand to do another. George at Raptor Racing sometimes stocks a few extra from a batch but he's a small business and can't hold inventory for years. Billy also produced a small batch of turn signal lenses last fall and I think the previous batch of turn signal lenses somebody else did a batch in 2013. That's actually a pretty short interval as our group buys and batch runs go, so when you see parts availability, DON'T WAIT.
You also need to log in here every day, maybe two or three times a day and check the classified subforums for new listings or anyone posting that they are parting out a new wreck. It still does happen about once every other year that somebody totals a pretty decent Supra. But you have to be ready to pounce because the rest of us vultures are circling too and certain "holy grail" parts are often marked sold within seconds of being posted.
Lastly, go ahead and post what you need in the "wanted" section and give your location. There are a number of us who "hoard" parts and may have extras of something you need, but we're not in it for a business, mostly holding spares for ourselves. We can't be bothered to advertise or deal with shipping and certainly not just for a few measly dollars. Posting up a serious $$$$ offer might shake loose a part out of one of the hoards. Particularly you are more likely to get a response if the hoarder is local and you can go pick it up the part yourself.
I'm told that we've lost a number of our younger members to something called facebook and that parts and parts cars are sometimes advertised there but I wouldn't know. You'll have to explore that option for yourself. Good luck, and again DON'T HESITATE when you see Supra parts opportunities because they don't come around often.