Hello Theresa. Welcome.
I'm also a Midwesterner, in the Midlands. From Iowa, now in Warwickshire. I get Old ElPaso products to do mexican dishes, and Tesco's does a great frozen chicken enchilada dish, though their "mexican style" chilli beans suck, lol. Their plain chilli beans are fine though.
I'm hoping to get a Midlands get-together organized in the spring. There are a few of us here, and maybe some others will travel.
Edit: Almost forgot to mention, you can get Betty Crocker cake mixes, frosting, and Bisquick from a few places here, Tesco's and Co-op Food Centres.