Sorry I had a house warming party yesterday and couldn't follow anymore.
As for machining basically a ball joint extension like mentioned above, the issue would be with the angle the control arm would now be at. Picture a 4" spacer between the ball joint port on the knuckle and the control arm, that is now your weakest link due to shear forces, the control arm would most likely interfere with the disk as well. The number one issue for companies making this kit is for the control arm portion surrounding the ball joint, hitting the disks. Just because it doesn't touch when static, bushing deflection, and general flex would distort the arm enough to hit the arm.
There are only 3 ways to go about this, when I get back in an hour or so, I'll draw something up and share.