Here is a pic of mine. I went off the move along pics in the film and used a piece of PVC, slipped a rubber hose over it with some clamps and slapped a rubber cap on the top that I picked up at an ACE hardware store. I taped off and painted the end of the PVC that was exposed with left over krylon fusion satin black spray paint. Once it was together, I wired it on with some left over picture wire .
Here is a thread I started that has a boat load of info pertaining to the left side tube.
http://www.mepd.net/forum/viewtopic.php?t=1570
Good luck with your build .