My passenger side balljoint(s) are starting to "speak up", so I am shopping for replacements.

Who makes the original-equipment balljoints for W126 ('84 300SD)? I emailed one company who I bought from before, who supplies OE parts only. They claim that Febi/Bilstein makes these (both the lower balljoints and the upper control arm/balljoint set)... I thought it was Lemfroeder...

Anyone know for sure?