The SPC arms have been out for a few years now, but since most of their work is in the Corba kit car business, they have not pursued advertising for their mopar products.

Since the Mopar upper ball joint is used extensively in oval track racing, the mounting cup as show in these two recent styles of control arms is also widely available and it is entirely possible to fab up a system similar to these two with very little effort and quite a bit of cost savings.