The far left piece in these pics is a piece of cane that may work also if the diameter is not too small.
I call it cane because it has no flat spots between the nodes, it's thin walled and the nodes are really stretched out.
It is 72.5" long, 1.4" O.D. with 1/8" wall thickness approx. The nodes are spaced at 21.5", 20", and 22" apart.