look for mag wheel repair places ring them and see who they suggest.
i supplied the wheels he cut them and fitted brand new ROH chrome rims to the centres, balanced them and threw in some wheel nuts and lock nuts for $660
u can also increase diameter if u ask, u can use a 14" centre and have a 15" rim put on. just remember if your making them to clear brakes then u effectively still have 14" clearance issues.