Buying cassettes in Pittsburgh?

I'm curious, are there any Pittsburgh-area music stores that actually sell cassettes? (I mean, a large, dedicated stock of them - I know The Exchange has small batches if someone trades them in, but that's it.) I know that neither Jerry's or Attic have them.

I do remember Dave's Music Mine in the South Side having an entire basement full, but that store has since closed. I was curious if there's somewhere else I could look. Lot of cassettes I had as a kid I've never been able to replace, hunting at flea markets and things.