Heat Shrink .... $5.00 per 5 linear feet. I have a ton of vintage, American-made heat shrink, in all your favorite diameters. I have maybe 4,000 or 5,000 feet of it. Probably came from one of the New York studio shops I bought back in the day. Nice stuff; way, way better than Chinese. 1/4” diameter.
Shipping is negotiable.