Where can I buy High Bias 60 min. cassette tapes in person, not online?

Man, these shits went the way of the buffalo quickly. I need to pick up some high bias (NOT NORMAL BIAS) cassette tapes, 60 mins or shorter, and I want to do it in person. See, if I order them online, it becomes this whole thing, and then I’m paying shipping and waiting for them to come in the mail and it’s all involved and gets all retarded.

What physical store can I walk into and buy a tape that meets these specificications?

Best Buy and Target are out.

Did you try Radio Shack? I don’t know for sure but they seem like they would be the best mainstream store to have them.

Another thought would be Guitar Center or similar music shops. Failing that, buy enough, ($25) and Amazon ships for free.