Attached Link: http://www.joes3dfantasyworlds.com/down/primitives/primitives01.htm

hi - i have a morphing ring/tube in my download area at: (it's a bit edged and the textures are somehow distorted. but you can scale it at your taste, then export it as a single prop and apply a new texture if desired ...) i used the uvmapper tool lithunwrap (downloaded at: http://www.geocities.com/lithunwrap - sorry don't know wehter the link still works ...) withihn this program you can create a tube of variable length and thickness. hope this helps :) joe