I think they don’t offer any because there is no market for them... Almost all other rooms do not offer any 5 card draw games at all because it simply isn’t really popular....
Maybe a solution could be to set a home game of your own on
pokerstars... I don’t know if you can freely choose game type and limits but that could be a way to have a high roller 5 card draw table.... Good luck in finding people to sit down with you there though...