Shop around and buy an OE replacement. Call Phil at Fastlane and see what he can do. Anza is probably the cheapest. Buy the gaskets and a new rubber hanger, too. If you have the OE one piece system the instructions in the muffler box should tell you where to hacksaw to splice in the new center section. You'll also need a suitable size clamp.

The OE exhaust system is very well engineered - quiet with low back pressure and the OE replacement components are DIY bolt in and good quality.

If you buy some kind of "sport" system or have a local muffler shop fabricate something from generic parts it will probably be noisy (exhaust noise, mounting rattles and resonances), and maybe even short lived.

Duke