I've got a Kona, can't remember if lava or cinder one bits it's around the size you want. Currently just a frame but my intention was to build it up to a good spec and sell.
Spec wise I was going to go LX 3x9, but could go flavours of xt (m760 or m770) depending on budget.
I'm not in Devon but don't mind posting.
If it's of interest I don't mind building it up, or at least getting it to a stage it's easy to post and easy to assemble when it arrives.