Bry
There are any number of UK suppliers ... we used one in Leicester IIRC.
A search not come up with one ??? I can't believe that.
I have a length similar to your pic. here, but be aware that no profile is all that accurate .. it's not meant to be.
Depends what you expect from it.
It ain't cheap.
BC
EDIT ..
This might just be the people, but the name rings no bells. Same outfit, different name ??? Who knows.
http://aluminium-profile.co.uk/BC