Cat-Back dual exhaust - 1989 Burb

[1987SierraClassic]

I currently have a cat-back dual exhaust on my '89 Burb. It was on there when I bought it and whoever put it in, did a nice job, but now it's rusting to pieces. I'd like to get the same type of system, but all I can find are single systems. I may be stuck having a shop duplicate the system that's there, but I'm thinking that would be big money even if they had the old pipes for a pattern.

Anyone know of an aftermarket cat-back dual exahust for these rigs? I've searched Flowmaster, Dynomax, Edelbrock, Gibson and a few others but I've come up empty...

Thanks!

1987SierraClassic (and the '89 burb of course)