yeah i make my own
i cut off the tb tube end and use reg hose to join it to an old 90* spark plug boot that i yank off a junk set of wires hanging around.

if you wanna get really fancy you can buy a short length of 3/8ths metal hardline but that just makes install more annoying than using regular 3/8ths rubber hose

cost like 2$ for the 1ft of rubber hose