Sorry to hear about the loss of your dog, littlejuniata. Losing a mini must feel like losing a family member.
I know it's not central PA, but one of the finest kennels in the country for miniature schnauzers is Blythewood Kennels in Lansdale, midway between Philly and Allentown. The owner, Joan Huber, has raised and shown minis for over fifty years, and she still seems to be going strong. We have two of their wonderful dogs, bought at different times. (I loved the first one so much, I had to go back for a second!) It may be a bit farther than you wanted to travel, but you could not go wrong with any dog you bought from them.
Incidentally, this is my first post to this site although I've been reading it for quite awhile. I enjoy reading everyone's posts. This site's a real gem.