Seat for a 1970 Chevy C-10

[chanclas90063]

I bought this 1970 C-10 and after purchasing it, I realized the seat was not bolted down. When we took it apart, we realized there was no frame for the seat. I ordered the frame and after installing it, we realized the seat was not from the truck. I've been to the pick-a-part three weeks in a row and could not find a good one. Went to the Pomona Swap meet and two weeks ago and couldn't find one there either. Can anyone suggest where I might be able to find one?? It doesn't need to be new, I have a friend that will upholster it for me. Any ideas or suggestions are appreciated...