They're probably interchangeable for a good chunk of production years:

Good quality stock shifter boot: just the rubber will do. (5.5" diameter?)

Passenger seat belt clasp (half of the outer housing of mine fell off)

Anyone know where I can get a good replacement vinyl floor mat that looks/is the same as OEM? Not sure about a molded carpet swap because I'm outdoors all the time - it would get ruined.