Blindstitch,
I live up near Superior, WI, and I was pleasantly surprised to find CCI BR-2 and Federal 210 primers at a Mill's Fleet Farm. Unfortunately this was in Wausau. I also got lucky with H4350 at a Schuler's in Eau Claire. I am lucky and get to travel for work at least once a fiscal quarter, which allows me to find reloading supplies.
For you, have you checked
Midwestern Shooter Supply in Lomira, WI? It is a little up the road from Cabela's, off of US-41. (Sidenote: while in Lomira, take state highway 67 down to Theresa and stop in at
Widmer's Cheese.)
For online searching use this:
http://www.gunbot.net/