tranny

Hey guys- my 92 SC4 has a set of 17" Kosei S8A rims, which as far as I can tell have been discontinued. I would like to purchase a fifth to act as a spare, and in turn would enable me to have one of the rims, currently bent, be fixed without missing any road time, as well as getting a fourth centercap, which I am currently lacking. Anyone have any good ideas for how to obtain one? Any large wheel classifieds online, or shops which stock older rims? Thanks much...

Jeremy