Mayhemm
Model S P85+ "Lola"
What about center caps and lug nuts if you're changing from silver to grey wheels? How easy are these to get?
Just contact your nearest Tesla service center. I'm sure they'll be able to wrangle you up a set. As to the cost of said items, I can't imagine them being more than $100. Personally, I'm going to use the lugs and caps from my grey wheels on my silver ones for this year. Hope it will give them a nice, contrast look.
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No idea what i'm looking for on Tire Rack for TPMS. Can you share a link for the correct one?
Finding TPMS sensors for Model S on Tirerack's site is a bit convoluted. You first need to choose the Model S as your vehicle and then select a set of compatible wheels (any set will do). On the product page for those wheels there will be a "TPMS" tab (it's alongside "included hardware", "photos", etc). The ones you are looking for are Modified 433MHz Tire Pressure Sensors. Sorry, I couldn't find a direct link to them and they aren't listed in the generic TPMS section of Tirerack.