Thanks for all the replies.

re: buckets, I don't *need* the bench seat - it's just what came with the truck. I know we'll never use the 3rd seating position anyway. If I can't find a seat belt latch I'd look into replacing the seats if that would lead to a solution to my problem, but we're not looking to spend any more than we have to, so I'd just as soon just get the belts. For most of the rest of its life it's going to be making sub-50 mile round trips, so I don't care that the bench seat is uncomfortable.

re: ebay I've been looking, but so far I've only seen the 3-point harnesses being sold without the latch side.

re: pictures - got your PM - those do look awfully close to mine. I'll take measurements tonight to be sure, unless someone here can chime in and tell us if the '86 truck's belts are interchangeable with the '88 belts? I know sometimes they carry stuff like that over even into new generations.