Don't know the whole answer because the picture I took before tearing all the plugs out is only of the front half of the floor. All of them in the front seat area appear to be plastic except for the part of the sheet metal that raises up on each side of the transmission tunnel. The front seat sits on it, I hope I'm making sense without pictures but those two are rubber. So there will be one rubber one on the drivers side and one on the passenger side.
Hopefully someone will chime in with the rest cause I could use that info as well.
