I haven't heard of anyone having problems with exhaust fitment on 96 2+2s, but then again I don't know anyone with one. You should find the exhaust you like first, and then call the manufacturer and ask them if it will fit on a 96 2+2. They should know. If it turns out that 90-95 exhausts won't fit yours, I think finding a good muffer/exhaust shop that will fabricate one for you would work fine. They're usually reasonably priced if not cheaper than buying a brand name catback, and can look just as nice. But it will be unique as well.
You could ask for an X-pipe for better air flow.