Its a cheapy thing Matt, cost about £5, just got it as a placeholder to hold a tube and some patches.
It is held on by straps and is not easy to get to, but as it just has a tube in it I wasnt bothered.
I will be looking at something from Carradice, I have mailed them today and asked if I can visit.
Maybe I can see if they have anything going cheap (seconds) and see if anyone from the forums here wants anything.