a buddy of mine gave me an incomplete set of 18x7.5 R1 GTR-4 rims, i havent been able to find a 4th rim. I know the R1 company does not exist any more but i know that other companies make the same style rim as the gtr4. If any one can help me out finding a 4th R1 rim or another company that makes the same rim that would be awesome.