Tucson, Arizona - Where can I find a Bologna Ring?

I've searched high and low at the major food suppliers (Fry's, Bashas, Albertons, Walmart, etc.) here in Tucson, AZ and either I'm completely blind or no one carries Bologna Ring.  I used to get them at Meijer in the Midwest until I moved here.  I've got a hankering for some homemade ham salad sandwiches and the most basic ingredient that my mother's recipe calls for is nowhere to be found.  This is a city of over a million people with all sorts of nationalities, so I figure a Bologna Ring has to be somewhere.