Christian McArdle wrote:
You could always use 22mm chromed copper plumbing pipe, if the diameter
isn't critical. That shouldn't be too difficult to find, although 15mm
would
probably be easier.

Why not 22mm stainless pipe?

I'm sure you could, it's just that chromed copper pipe can be found even in
DIY shops, rather than specialist metal merchants.

Well, my local Homebase stocks 22mm stainless pipe right next to the copper.