It has been awhile...over a year, in fact. But I am still thinking of these sandwiches.
I was traveling to the Des Moines Marathon last month and had breakfast at the Big Steer Travel Plaza on the outskirts of Northfield, MN. I couldn't help but notice they had a hot beef commercial sandwich on their menu.
This falls into the geographic range of the beef commercial, seemingly on the eastern edge of the zone.
Might be time to pick up these pursuits again... :)