Trade 3" exhaust for 2 1/2"

Hello. I recently acquired a stang that was built with the intention of going turbo'd. The car came with a 3" X-pipe into 3" Flowmasters and out. It's on a GT car, but had custom tips put on to exit just below the rear bumper. I would like to trade, possilby plus cash for a 2 1/2" setup. I am located in Oregon and would prefer not to ship stuff as it's expensive. Let me know what you've got.

Thanks!