Exhaust flange?

I have a set of advance adaptors slick fit headers and they came with exhaust clamps but I dont want to use those can anyone think of a place I can buys the tri bolt flanges or something else that will work. Iv seen the flowmasters ball flange ones but I need them in 2 1/2 on the headers and 2 1/4 for the exhaust.

jegzzzz