Yeah, I know next to nothing about it myself. The university age son of a friend of mine has one, and I did get to see it in action. I found the file by accident when searching for the availability of the OEM caps. A reddit user advised that P/N 1343663 is correct for new Hydra caps. If that's true, they are still available, and quite cheap. I wouldn't even mess with trying to make them, except that I really like the embossed logo. My car is white, and I'm toying with the idea of going full '90s, and painting the wheels white, as well. Or if I stay with silver, I needn't be so accurate with color match, and can use DupliColor wheel paint out of a spray can. I've used it before, with decent results. I'll let you know my experience if I get to this before you solve your dilemma.
-Wilson
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