After buying and returning two toilet paper holders because I just couldn't find a good place for them I had Barry build me one. It works great! It does not interfer with the furnance vent (or air flow) or closet door and the bath door slides closed without any issues. It is
what I wanted. I'm keeping him busy because now he is working on a shelf for the cabinet above the drivers seat. Tomorrow he will build me a night stand.
Just login to see the pics (click on the pic for a larger view).