I know rc line is silicone, unsure if the fuel will eat this or not.
https://www.ebay.com/itm/RC-Nitro-Car-Fuel-Line-Tube-Clear-Hose-/203266352842?var=0&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338590836&toolid=10044&customid=3413b96c66e11539a492d981964fc2ed