I need a new ball joint for my '75 Maverick, but I don't think it will be easy to find one in Sweden since Mavericks were not sold here. Is it the same ball joints on 70's Mustangs or something? I think its called ball joint, it's hard to find translation. In Sweden it's called "spindelled", directly translated to "spider joint" or "spider link".
Are you needing the upper or lower ball joint? The lowers are usually only available as a control arm assembly.