Andy check out VH Coachworks I got mine from them and they work great.
http://67-72chevytrucks.com/vboard/s...d.php?t=537720
Or check out A1 Electric. You would have to do some fab work to install the A1 Electric locks but shouldn't be too hard. They also offer a power window kit made for the 67-72 C10's
http://www.a1electric.com/catalog/cat_key.htm