I always just go to a fabric store and pick out something I like and don't ever bother with brands.
If there aren't any stores nearby where this is an option for you, you might look into shopping online. There are several sources for fleece online.
You could try eBay, search "fleece bty" or there are stores like
The Fleece Lady,
JoAnns or
Corinthian Mills.
I've got fleece that I've had for two years or more that's still just fine, so durability hasn't ever been an issue.