Suggestions on where to get suspension parts for a 70 C30?

[stangs530]

Hey everyone! I currently have a 68 C30 and a 70C 30 both are 2wd that I am combining and customizing the two to make one bad A$$ truck. I want to replace the ball joints and other wearable parts on the front but I am not sure where to go to buy parts. The majority of parts that most places sell are for a 1/2 ton truck, not a 1 ton. I mostly have looked at LMC and they don't have much. Are their any places you guys can suggest for me to go to? My local Napa wants a pretty penny for the parts so I am looking to save some cash if I can.

Thanks in advance!