I've got a set of the original wheel locks from my 89 951, as far as I know these came on 80s and early 90s 911s as well. I've only got the locks and the key, I have no idea where those weird lugs are, but if you don't already have them I'm sure plenty of people parting cars out do.

$5.00 + shipping gets them, or come pick them up if you're nearby.