[Ron in SoCal]

You're running GW lowers right? Although a fan of their stuff, there's a guy on PT that had a huge proplem w them. He had to change uppers/lowers out to SPCs (Marcus helped him) to get his wheel centered in the well. He also changed his spinde but I don't think that was the problem. IMHO not every vendor's lowers place the spindle/BJ in the same lcoation.

To answer your question, I don't know of any lower that adds caster and most vendors don't advertise their caster/camber changes.