300zx irs

so ive had this nissan 300zx irs sitting here waiting for me to put it on the truck, well im just about ready for it but now i realize when i got rid of all my scrap metal couple months ago i tossed the 300z wheels in too.. so i was wondering if anyone knew if thats a specific wheel i have to have or if others will interchange with it guess im gonna have to call around to the junkyards unless someones got a couple 15" rims they wanna get rid of i believe its a 4 lug