Building up around a common Hub, for spare parts , will allow a minor adjustment to the over-all width..
Axle longer add a spacer , Re Dish..
[Rohloff FWIW is 135], several others like Shimano 8 speed IGH can be adopted , and wheels Built around it Use the RD mount for a chain tensioner ..
That is what I have on my Bi Fri Llama .. IGH + chain tensioner..
Ask Bi Fri about shipping a built wheel? or call the MN shop you Listed ?
Perennial Cycle Minneapolis - Perennial Cycle
and Ask..