Thanks Andy. I've got a reminder alarm set on my phone - hahaha!
I talked with Steve (KCMongo) when we had lunch yesterday and we looked up the business name through Google maps. Turns out it is in fact the very same location I have driven past for decades, never stopping as it never looked like it was actually "in business/open".

Screenshots below for anyone interested.

Steve's response was, "How did we not ever know about this place?".

Very much sounds like it could be worth our while to get an appointment and make a road trip.
