I bought an entire kit for my '71 from CCP,
www.classicperform.com. It included upper and lower ball joints, inner and outer tie rod ends, adjusting sleeves, idler arm and a poly sway bar bushing kit. All this only ran me 269.00. I also bought some drop spindles from them as well, and I've only had great service. Their parts seem to be the real deal as everything I've ordered from them looks and feels like hard american steel, and none of the cheap chinese reproduction crap.
If you don't need the whole kit they sell everything individually as well.