Ktech, from what i've heard they are very very good but unless you have an existing relationship with them then you are often at the back of the queue ....

HM Racing are also worth a shout, www.hmracing.co.uk

Perry Leask is the guy you want down there, an ex MotoX champion and Ohlins expert, had my forks set up there (showas) ... he's also done set-ups for a couple of other DSC boys ...