folks, the swival BASES are not part of the seats.  ANY vanagon seat will
work on these swival BASES, regardless of year.   the swival BASES are WELDED
into vanagon CAMPERS - the only vanagons that came with them. in order for
you to obtain these swival BASES you must find a junked vanagon CAMPER and
CUT THE WELDS and RE-WELD them into your van.

"this is your brain.  this is your brain on drugs. any questions?" :<)

chris