That split loom stuff works pretty well. Originally is was used in GM cars back in the 70s and many years after. Other car companies have used it as well. It can be had in a few different sizes, 1", 3/4", 1/2" and I think 3/8". It can also be had in different colors, I've seen black, blue, red, purple and yellow. Its probably available in a few other colors as well. One advantage of the black is you can wrap a short piece of electrical tape around the ends and anywhere along its length, in case you try to stuff too many wires into the loom. I have no idea where to find it online, my old eyes can't see that picture at the summit website well enough to be sure its the same stuff I've used, but it doesn't look right to me. I've always gotten mine from the big swap meet in Jefferson WI, so it has to be available someplace. Not much help, I know, sorry. Gene