Undoing stupid-human tricks

Well...my friend's Feather Duster sounded weird. A look under it today clued us in as to why...it has a very-cheezy "Fast Eddie's Discount Muffler" exhaust on it, with what looks like a 1.75" pipe, a lousy (and cracked) muffler, and the pipe over the axle kinked.

This needs to go, obviously...does anyone make a GOOD bolt-in system for a slant-6 A-body, or will we need to build one?