Nope I don't. I know some people on here have found them at their local stores, but I know the Petco's by me (Royal Oak and surrounding areas) only go to 55g at the local ones here.
EDIT- Just spoke to my Sister because I know she is looking for a 75g for her pond fish to overwinter and she said the one in Warren (Dequindre rd) includes the 75g's in the sale but are currently out of them. They said they may have more in a few days though.