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You want door sill or puddle lights? Cause you linked to puddle lights.
I bought some puddle lights from Amazon.com. It has the Tesla "T" logo, but not the "Tesla" name. That's enough for me. Cheaper but with FAR LESS reviews... so hopefully its not an issue.
As for illuminated door sills. I dunno. Personally, I would like some, but I dislike the idea of a separate battery but also don't want to cut up the car to hardwire... so basically I'm just screwing myself over.