where to get rear suspesion parts

[rizick]

my 66 chevy c-10 is need of the rear control arms and probably the springs and related parts as well. I just bought a 2 1/2" drop spindle & disc kit from matt's classic bowties for the front. I was planing to go with drums on the rear and was looking things over and decided the rust through spots on the control arms needed attention, and maybe deal with the rear drop at the same time but I am not sure of what all I need to do and buy. any help would be appreciated.