Rolling your own tubes is a hell of a lot cheaper than buying them but it takes longer. What you need is kraft paper 70lb. White glue or wood glue, wood glue is better. Something to roll the paper with like a wooden dowel. A Popsicle stick.
Cut a desired length of Kraft paper roll around dowel twice, then apply a thick coat of glue to the paper then spread it out with a Popsicle stick. Now keep rolling when done rolling take it off the dowel and let dry and your done.