I just got back from being in Pennsylvania. I went around Altoona and did see a couple of quilt shops, but don't remember the names. Could look at my receipts though.
I would google under "fabrics" or "quilting shops" to get a list of them around there.
Also, since I am not familiar with PA at all, I would list the cities where you may be going. I'm sure that someone on here can help! Perhaps even meet up with a couple, that's what I did.