I'm pretty sure Jay and/or Sara are there most Saturdays. If you're in the area, probably best to give a call before stopping by to make sure. The phone number is 248-346-3205.
Jay's probably working to fulfill the last pre-order right now but they'll likely have some basic "shelf stock" sooner or later.
ETA:
Just realized who's asking... 's up Matt, how ya been? That'd be a bit of a drive unless you're already here!