You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Not directly, but my expert Joe @ OCDetailing (www.bayareadetails.com), who does my paint correction and cQuartz, has a colleague who does his powder coating. I won a referral set of 21" Arachnids but the set is only awarded in Silver. I wanted a dark color for my wife's Obsidian Black S70D, so Joe had them powder coated a very dark grey (and of course applied cQuartz):
Just added the black Tesla OEM lug nut covers and center caps.
I highly recommend Kwicksilver Wheel Repair of San Francisco (actually based in South San Francisco). I have used them for 4+ years to fix scrapped alloy wheels and just change the color of sets of wheels across three teslas and 4 set of wheels.