Contact Todd at
toddscaraudio@hotmail.com also on ebay, toddscaraudio as his seller name. He is in Beloit WI and has TONS of supra parts for sale. I'm sure he has everything you need at a decent price and you may be able to drive there to save on shipping. Good luck.
PM me if you don't reach him, I have his phone # but I don't want to post it publicly without his permission.