Hey guys
These are dead easy to make, just like the originals.
I got a tube that was left over from a roll of plotter paper (just like a big toilet paper roll) and it is exactly the same diameter as the originals.
Just cut pieces off to the correct length from the roll.
You should be able to get these from any printing place as they will have them left over after they have used a roll of paper and would usually just throw them out or pile them up in a corner somewhere.