Thanks MrHosping. I checked out epc.tesla.com with my U.S., based Tesla account login and part 1 (the hitch itself) is shown, but not numbered, nor with a part number in the table below.
Might you be able to advise if the column to the right of part number lists any restrictions on sale for your account login, presumably not in America? Probably not going to be the same as restrictions on sale in America, but curious.
In the upper right corner you can enter Account Management and change country to whatever spec you want.
But anyways, here's the full table:
Some of them say restricted, but there's a guy on the local Facebook group that bought all the parts for his Performance at the Service center. Maybe it's not doable in the states since its not official? Maybe look into the Y hitch.