Have him call Ira's wrecking yard in Madras, as they had 3 trucks last time I drove by, but I don't know if they have any seats.
181 Southwest Merritt Lane
Madras, Oregon, 97741
Phone: (541)475-3861
Here is a seat in Salem for $50:
http://portland.craigslist.org/clc/pts/2673918021.html
One in Medford for $75:
http://medford.craigslist.org/pts/2663724485.html
Best I can do. Haven't seen anyone locally parting one out for a while.