2.25" inlet CAT with 2.5" outlet, are these made?

Looking for a high flow cat with a 2.25"inlet and a 2.5"outlet, looking to make a 2.5" true CATBACK with a super40 & turndown... but i want to do it the right way with the right amout of backpressure from the 2.25" pipping.
any one know who makes these kind of cats?
any one think this is a good idea? bad idea?
TIA

You could always just get a 2.5 cat and then fit on an adapter piece that goes from 2.25 to 2.5

a reducer
jegs has them pretty cheap
but i think autozones or part shops have them also