Seat identification

[Woods77K10]

Help. I'm currently re-ulpolstering the seats and need to replace the foam that is in my 1977 K10. BUT, I can't seem to identify what these might have been out of because it's doubtful they are original. I need to replace the seat bun or bench and back foam. Center console is done! Pic of seat out of the truck is missing the console so that is the purpose of the pic of the interior and the almost completed tray. Any suggestions welcome!

 

[MarineOne]

My seat looks very similar and is from a chevy van might try looking there

 

[bucket]

Looks like old aftermarket.

 

[Rvcookin]

I have the same seat in my 1976 c20 I just bought. I am trying to identify what these came out of, no luck yet. I need to find a seat adjuster track for mine they are mounted solid, and my daughter cannot reach the gas pedal. I need to upholster the seats too, but mine are only worn on the top where the driver sits.

 

[Old Guy Bill]

You can buy blocks of seat foam then custom cut it with an electric turkey carving knife… I know it sounds janky, but it’s actually how seat upholstery guys do it.