well you can relatively easily install any seat thats flat underneath. you
will have to make your own adapter plate but thats easy, as in maybe half a
day of work.
I just installed a set of mkII recaros, that i bought for $200/pair. You
will need to salvage your old seats to get the rails out and screw them to a
metal plate, that you in turn screw the new seat to. when disassembling your
westy seats keep the springy things that push the adjustment lever back in
the locked position and reuse them on your adapter plate (slight modding
required).
You will not believe how comfy your westy is now.
i should really post pics on the vanagon wiki. this is an easy mod.
flo