Have you thought of using ABS sewer pipe as tubes. It's what we use in
the Clothing and Textiles collection. You have to be careful that the
supplier doesn't send PVC tubes because they both look the same -
black. We cover ours with cotton stockinette which comes in a tube
shape. It's easy to slide it over the ABS tubes.
Elizabeth Richards, Ph.D., P.H. Ec.
Professor Emerita,
University of Alberta.
J