New member, new Model 3 owner here. My manufacture date appears to be 10/21 according to the sticker on the door. I went to the parts counter and gave them the part numbers for the support and the switch. They asked me “are you trying to install lumbar on the passenger side?” And I said I was. They insisted that my car was “too new” and the parts I was requesting wouldn’t work. Were they confused or just giving me a line? Long story short, they wouldn’t sell me the parts! Is it at all possible that the seat build changed from July 2021 to October 2021 that would prevent this retrofit from working? Thanks for the input!