The floor COULD have molded carpet, only if it was ordered with the option. The side panels are just carpet that glues to the inside of the 1/4 panel and it could also have a tail panel cover. Fold down seat also had hinge covers of some sort. I've located those also and hope to put them in even though I don't have a fold down seat.
Here's mine (currently a work in progress but you get the idea) Personally I've never seen one with a vinyl mat, only bare or carpeted. Unsure how mine came originally. When I bought it in '87 it was bare except for the plastic tail panel cover.