Small Bolt Pattern Wheel Adapters???

Nah, I'm not planning on drag stripping her, just cruising. Want to put a set of Keystone Classics on her and would like 15tx7's or 8's on the rear and regular 14x6 or 15x6's on the front. I can find the 4 in. pattern in the 6 inch rim, but the 7 & 8 inch rims are the tough ones to locate in the small pattern. Original Keystone rims, cost a fortune if you can find them, so the Crager remakes are what I'm contemplating in the 4.5 pattern for the rear.