Well, I'm about 4,000 miles away from the factory store and have never had the chance to darken their doorway, so I can't speak from any direct personal experience sadly. But reading up on posts on the interwebs leads me to believe they may be had sometimes from the shop, in person (and certainly available from the shop, in person, during the annual Rendezvous). I don't think anything that exciting ever makes it to their online store.
You've got me beat, but I'm still over 1000 miles out and doubt I end up picking Pennsylvania as a vacation spot. Maybe it's for the best they don't put any of that stuff online--one less website to refresh every so often just to not find anything!