DragStuff

I'm working on a 1972 Ventura II. Wheel tubs widening I just bought the outer wheel tubs from summit ok now what about the inners I seen dse has a set for the car but it only goes so far as tire diameter I'm using like a 28x13.50- 15 tire on a center line rim #cll005107545 I belive if I'm correct that would be a 28 inch diameter tire where do I get the wheel tubs at a better price ? I know few have welded a strip of metal between the factory tubs I want a cleaner look