www.driveshaftshop.com makes custom-size axles; they can probably build ones for Teslas pretty easily. The calipers are probably made by some supplier like Bre

www.driveshaftshop.com makes custom-size axles; they can probably build ones for Teslas pretty easily. The calipers are probably made by some supplier like Brembo anyway; it'd be nonsensical for Tesla to build their own. The trick is finding which brand/model they really are and what's compatible, like you said. This taxi guy should start his own webpage about Tesla-compatible repair parts.