For Yosemite or SEKI, just about any commercial hard bear canister is OK. I've gotten my permit before with Garcia, Bear Vault, and Bear Boxer. I have never seen anybody getting a permit with Ursack.
At most of the permit stations in Yosemite, they have a printed illustration that shows each of the common commercial hard bear canisters. They ask you which one you have, and you have to point at the right one in the illustration. If you have -something- that is not in the illustration, they will ask to see it, and that will give them a chance to reject something that is nonapproved.