I found some offroad H-Pipes on Summit Racing. BBK has one for $185 and the Summit brand is $135. Then just buy some cats and have an exhuast shop weld them in. Problem solved.
I have the Magnaflow catted-x and it's great, but if I could do it again, I'd go with the SLP catted-x, because you can remove the cats and it comes with straight pipes to put in their place. This way you can go o/r whenever you want. Plus, it's not any more expensive than other catted-x's.
You can get a BBK o/r h-pipe and weld on some Magnaflow hi-flow catalytic converters and it'll still be alot cheaper than thet MRT catted h-pipe. They are like the only one i know of and they're prices are insane.