bluebellbus

I bought a barebones 1990 12 passenger 1 ton van and it came with only one three passenger bench and I need more seating. I'm wondering, how interchangeable are the seats in them? There looks to be large holes (with the chrome covers) with visible latches in the floor for mounting 3 benches. Then there looks to be some threaded holes near the back doors which I assume to be for the 4 passenger bench. How interchangable are these seats, and what vehicles could I steal them from at the wrecker? Similar vehicles don't appear to be abundant these days for wrecking in these parts.

Thanks for your help in advance,<!-- google_ad_section_end -->