Likely it's a private labeling deal. They buy in bulk from Rare Parts and package as Skyjacker. Either way, that's a steal for those joints.I was about to say, those are Rare Parts ball joints, so either they stole design and are going to get sued, or...I don't know.
Final update on this -Ok cool, i will likely go with the Dynatrac knurled option then as I'm sure mine have stretched after 4y of mild to severe abuse.
Thanks again for the insights, invaluable as usual BBS!