I know one of the founders of Tethred (Ernie) was making them for a few years back and selling them here. You may find an old one through the classifieds. My personal opinion, there is marginal benefit over aluminum tube. I don't know why the tube gets a bad rap, I guess the noise factor? I'm not out there playing it like a musical instrument, you just wrap it in some tape and be careful not to bang things around.