Auraraptor

I am looking for a tall, completely silver valve stem like the one pictured.
I am have difficulty sourcing them, only instead finding BBS or porsche logo versions.
Supposedly this was a factory cap prior to the wide-spread adoption of TMPS.

Anyone ever see it for sale? Thanks
(sorry, these caps have been on the car for nearly a decade, with one now cracked forcing me to look for replacements)

Auraraptor

Of note, happy to pay a finder's fee for someone who helps me / directs me to an actual place to purchase...