There is another shop in Williston one can use, if needed: "Bike & Skate Shop, 1316 2nd Ave. W, Williston, ND; (701) 572-3561."
I discovered this yesterday when attempting to call the Schwinn shop looking for a front bike rack for a family member who is riding through Williston now, but a recording came on and said # was disconnected. I then did a Google search for another shop when I found Bike & Skate. I called them; no front bike racks in stock...just rear! They confirmed the Schwinn shop was closed.
Just thought I'd give this update for those who might be riding through Williston on the Northern Tier!
I will contact whomever needed in ACA for map updates as well.