what seats fit into 68 c20?

[usmccraig23]

Guys. Im doing some major major work to my truck. I found a site online that sells new bench seat frames for 800 bucks.
JUST THE FRAME. there is no way i would pay that much for just a frame.
Im looking for any and all different types of bench OR buckets that will fit into this year. I just want something.
The old seats I have were early 90s racing buckets that were drilled in with self tapping screws. Retarded, so I had to save this truck.

Please help with anything that will fit into this truck. I have looked and looked to find the answer, just can't find it.
Thanks very much