Not sure when Michelin started making these, or Tirerack.com started selling them, but I just noticed 275/30R20 PS4S tires are now available with the acoustic foam and whatever other characteristics are changed to match Tesla's specifications.
https://www.tirerack.com/tires/tire...all=Blackwall&partnum=73YR0PS4SXLAC&tab=Specs
https://www.tirerack.com/tires/tire...all=Blackwall&partnum=73YR0PS4SXLAC&tab=Specs