Got it all done and it was a lot of work, but worth it to me over the cost of new parts. If I replaced the cat, I could see the studs on the manifold snapping off and then having to replace the manifold, and maybe it's bolts snapping. Didn't want to go down a rabbit hole.
The only non-original cut behind the left cat and joined with a band clamp.
Needed just one new gasket between the right cat and muffler.
And a new clamp between the muffler and resonator pipe.
Original resonator still fine.
Just back from getting a Virginia safety and emissions inspection.