Well then.. yah you could probably make them quite easily. My advice would be to get ahold of some professional peices, or look at some on someones car (tcp?). I would advise using the screw in style ball joints the aftermarket uses. The hard part that i can see is getting that threaded pipe for that ball joint, and then the pivot point for frame side of the arm.
Good luck! if they turn out good make me a set /forums/images/icons/smile.gif