I know, right?! I currently need about 4 inches of tubing for my wife's violin shoulder rest. Not sure where to buy that anymore. Maybe I'll try Napa.
Back when CT had a store on Hastings they still sold it by the foot, I went in for a 12-inch length of vinyl hose. The guy asked me what I wanted it for. I told him for automotive use. He said he had to ask me, because most people who ask for that in his store use it in their meth labs.