Mark,
3 options here, possibly a 4th.
A. Get new housing from Toyota. Not cheap, I think Toyota wants over $100 just for the housing alone. Complete assembly (trim ring, housing, & rear bucket assembly is near $200).
B. Get a used one from junkyard (not easy, try finding one in a yard that does not have a cracked lens, or it's rusting inside).
C. Break the seal on the glass lens, remove & refurbish the inside. Topic has been covered here on the forums somewhere
D. I have a spare housing that I can sell. I can bring it to the Baxters meet in 3 weeks. $20. No lens cracks or yellowing inside.