I've never heard of it frozen either, and I live in Michigan (originally from Grand Rapids, now in Lansing, with a short bit spent in Chicago).
I have fond memories of the Chef Boyardee pizza kits. When I was a little kid in the '80s my dad would make these every week when Muppets was on and I'd get to eat the pizza while watching the show on one of those midget tv trays.
Now that I have two little guys of my own I've started getting the chef Boyardee pizzas again. Too bad there is nothing like the Muppets for them to watch while they eat!
The pizza is certainly something altogether different than "real" pizza but I still like it, and perhaps for more than sentimental reasons. (that sauce w/ the little pepperonis, albeit processed, is really good).