I wanted to 'have" a set of 15x7 steel wheels, for use on both of my cars..( can switch around)  I had mentioned before, that rims are measured from "bead to bead". So a 15x6 can be mis-sold as a 15x7 because it measures 7 inches total across.  The 15x7 steel used on Caprice from 77-89 with the handling package are 7 inches bead to bead and 8 inches total   I found some on line, but they are $80-144 ea.  I contacted, a tire/rim supplier friend of mine and bought 12 new at 45.00 ea.+tax,  If anyone wants a set, they include delivery to "Canadian Poncho" headquerters in Ingersol....C2  p.s S10/Sonoma/Jimmy wheels,can be found cheap, but they don't hold the doggie caps..