That's the LSL adapter. Dunno if that is still available. I know that the Storz adapter is.
I'm in Wickford, near Basildon so a bit farther than Cambridge for you John.
However, if you want it I can ship it to you.
Yes you can use the original hoses but that depends on which handlebar you use with the adapter.
The bar I have for it is a nearly flat MX bar.