D&D makes slip ons that work on the TBird.
Predators from British Customs, not sure if they are still available or not.
Epco Stainless makes some very high quality mufflers.
The stock 00-03-04 TBS mufflers will fit the diameter of the headers, but the angle of the inlets could create a mounting challenge.
If you are handy and can make your own mounting brackets it could work OK.