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The Tesla store is always reliable for clothing, however you may want to check out Etsy. You may have to look a bit, but there are usually good quality clothing items on there. Good luck!
If you know anyone with an embroidery machine Tesla has posted files of it's various logos in several colors. They can be downloaded, digitized and turned into the format needed for embroidery machines. That can then be used to embroider the logo on any number of clothing items.
The problem with evannex is that most of the things they sell have their name or website on them. I don't want my "Got Frunk?" t-shirt to also say "evannex.com".