There were a bunch in " the day " in the Minneapolis / St. Paul area.
MAS was the biggest.
Now ????
Nothing close to me.
And I would spend there quite a bit with the misguided notion that I was keeping them open so when I needed that odd ball AN fitting or hunk of braided stainless on a Saturday afternoon , I could get it.
Too bad it didn't work out for them , because I loved the convenience.
At their peak , MAS had a blown Ford cammer on the floor along with a ton of other shiny stuff , and they made their own fiberglass too.
I went there on my bicycle as a ten year old for stickers and have no idea how much folding money I sent across the counter over the years , but it was more than a couple bucks.