I have a Syncro and have purchased replacement ball joints.  For the life of me I can’t remember the brand, but they are sitting in a box at home on GA. I’m currently roaming Arkansas. 
There has been much research posted and recorded on the matter . Basically any ball joint that is solid metal will perform well. There are lots of imposters out there. t3 Technique recommends Lemförder. If you can wait I can tell you the brand I purchased based on advice I found.  

Chris. 

Wysłane z iPhone'a

> Wiadomość napisana przez Dick Wong <sailingfc@dslextreme.com> w dniu 8/28/21, o godz. 18:52:
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> Hello All,
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> Time for ball joints on my 87 Syncro and I might as well do all four.
> Cracking/torn rubber. This is the first time in my possession.
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> Beck Arnley, Delphi, Febi, Lemforder, Meyle HD, Mevotech, or?
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> Longevity & Quality first, Price is secondary/tertiary.
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> Experiences & opinions please.
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> Thanks.
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> -Dick W.-
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> 78 Scirocco
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> 87 Vanagon Syncro Tintop
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