I'm sure some of the cheap hanging rails you can get from places like Ikea and Argos as suggested by Ken would be ideal, but you might find them a bit narrow for longer shots unless you extend the width as he suggested. His solution looks really good to me
The studio that our photographers use has a similar (but custom made) design that holds three rolls of material on the bottom that can be raised and clipped to the top. They use black, white and light blue most of the time. I'll have to have a look and see what the material is, I suspect it is paper.
If you use Ken's idea, you could put the roll on the top pole and not only bring it to the bottom, but also extend it forward to act as a FG too.