Is there any junk yards up there as i dont think they are turbo buick specific, if you can get one from a grand prix as some of them are aluminum, i got mine for 50 bucks locally.
All the later cars appear the same to me. I have stripped 85-87 montes and 86-87 olds 442's and they are the same as the regals . I have seen pics of the earlier aluminum supports and they appear diffrent but I guess they can be made to work . I have had around 80 g bodies I have yet to find a aluminum support so I wouldn't count on just stumbling across one
Cross referencing numbers in my old crash books indicates that it's 81-87 regal, cutlass, and grand prix. Monte carlo is listed as a different number although I don't know what the difference may be, and 78-80 stuff is a little different as well. 78-80 regal, cutlass, grand prix could have aluminum rad. support although few cars got them, mostly grand prixs.