Absolutely amazingly, I found Frankenberry locally this morning.
It's a Halloween miracle! 

You know it really did feel that way. I was looking for the great pumpkin, but I'll be happy with the Frankenberry. I swear, it's 40 years since it was sold here and even then I'm not sure it wasn't just something we picked up on trips to Grand Forks (at the Piggly Wiggly, doncha know).
Dale, it was at Superstore. Coulda knocked me over with a feather when I saw it.