I can get the American Racer's at a reduced cost from a local guy that races them. Last pair I got was $20 apiece and 3/4 tread!

I went by about 2 months ago and he was supposed to scare some up for me but I need to follow up.

No idea on the year of the seats. The small family salvage knew I wanted them and had them waiting on me when I got there. Paid $80 but they were in pretty sad shape.