There is a forum vendor who makes some. Here is a thread about them:
Just wanted to give a quick shout-out to a forum member and Tesla owner for building quality Titanium Lug Nuts at a reasonable price. I own several sets of aftermarket wheels (Konig/Enkei/etc) that the stock 21mm lug nuts are too big for. I ended up ordering 3 different sets of 19mm black lug...
teslamotorsclub.com
Also, there is a large thread here about aftermarket wheels. Most questions on that topic, or things that go with that topic (aftermarket wheels) can be asked there:
Thank you! You bet.
teslamotorsclub.com