[stephen low]

Why don't you try and make up a fibreglass outer that could be attached around the pipe and affixed to the wheel well skin?

I have assumed the pipe runs close to the side of the wheel well for this to be possible though.

Working glass around some form of mould would be very easy to do and once you had an initial shape you could build it up for strength.

I'm thinking about the same idea but inside the boot as an odour protection method to help avoid a boot full of fuel fumes.

Steve