1984 TRX200 Exhaust options…ATC200 Possibly?

So of all the things I need to fix on my old crusty monster, I think the exhaust is moving up the list. The gasket at the head is non-existent. The packing at the first exhaust clamp is out to lunch, which makes for a great calf warmer with all the hot exhaust leaking…and I am sure*if I got those leaks fixed I would discover the muffler isn’t much better. All the heat shields are missing with bolts broke off in the mounting points where they should be. I have been looking at parts and pieces on eBay, and other than seals, I am looking at used OEM pieces. Well, I already have a 30 year old exhaust that was free, so I don’t really want to pay for one. There aren’t any aftermarket options I have found. Then the light bulb moment…what about the exhaust from a 1984ish ATC200? I can find exhausts on eBay that are listed for 1982-1984 atc200. Now this question is based off the possibly incorrect assumption that mechanically my rig is an ATC200 from the engine back. If that is correct, I could have a completley new exhaust for not much more than band-aiding my 30 year old exhaust up, and still possibly needing a muffler. Anyone have any thoughts or experience with this?

Rob