The Cool-Flex version will last nicely, the rest - no idea but have heard of a couple of failures. I took the Cool-flex off of my '31, made up a solid replacement, using a Speedway piece, a couple pieces of silicone hose and some shrink clamps. IMO, the solid one is a better choice - FOR ME, anyhow. But it does give you an idea of an option. The bottom hose is a standard rubber hose, cut to length though could have done it the same way. Mine is painted, but could have had it chromed or powdercoated.
Before/after/connecting hose and shrink clamps (I have a worm clamp on the other end so I can disassemble if needed)