Looking for some help here, picked up a 1990 Chevy G20 Markiii dirt cheap with under 80,000 miles and a strong motor only catch was it has no seats only the back bench/bed.
I have been searching junk yards, online, ebay everything and can not find anything that looks similar to this base i have. I can tell its a swivel, the passenger and middle seat post look the same. Any input would be great. Drove it home with a kitchen chair!
Thanks much

 

It's more likely that you'll have to change the base or get seats with bases than to try to match it.