Hi, after 21 years (well, 22, since my car was built in late 1985), I plan to replace the plastic fuel lines underhood: 420SEL. I see two or three lines, attached to the heat exchanger-fuel cooler on the ACC suction line. I don't see this on the parts list: anyone know a good source and how much they cost? I have a horror of massive underhood fire so I am being proactive, if probably years late. I have already replaced the high-pressure power steering hose for this same reason. Thanks, and have a Happy New Year!