I tried a million different ball joints and configurations before I came up with the Jaguar conversion. It does require control arm modification and few extra pieces of hardware, but it allows us to use a commonly available bolt-on part, and fixes the unwanted control arm and steering arm contact. Kits to help with the conversion will be available by the end of the month. They'll be in the $30 dollar range (one kit does both sides) and then new Jaguar joints range from $15-$50 each depending on what brand you get. Overall a much less expensive option than Rare Parts or trying to source NOS.