[spannerrash]

So, I managed to find some but it is stupidly expensive (approx £230 for 10 mtrs). I need to make a note to self, "stop buying car parts when you are drinking".

I've compared the pipe to the original sample I have and it's the same.

Fundimentaly, it looks to me like 4.75mm with either a thicker tube wall, thicker coating or a combination of both.

I've got it now so I'll keep it but I don't actually think it's necessary to go to this expense. There are plenty of cheaper options.