By fit, do you mean direct bolt in? I think your closest bet for that is to find K5 or Burb buckets. Still some modification, however slight.
If you're up for some minor fab, there are a ton of options. I have 90something Dodge minivan seats in my 87. Before that I had something I pulled at a yard, can't remember what.
A lot of people pull the seats from 01+ Silverados. You can get the 40-20-40, use the middle as a seat when needed. I have a set for my K5 I need to put in. Plus on these is that you get your shoulder belts attached to the seat. Just gotta put a plate in the floor for extra support.
You can make anything work using the factory floor mounts. Just cut plates or square tube for an adapter. Mount the adapter to the top of the floor and the bottom of the seats. I used steel plate cut to size with holes drilled for the 87 seats. Just don't skimp on hardware.