You could use a formed heater hose el, but coolant hose isn't known for its oil resistance. I can't remember what the inside diameter is there, but you might find a Silicone el in the right size, Silicone hoses deal better with oil. You can cut that crimped Oetiker clamp at the steel tube with some heavy wire cutters, then replace it with a regular worm clamp.
I'll be contacting the OP about copyright fees for using my photo. :laugh: