Clogger,
Maybe two ways to go about this and a load in between.
1. Get the bike in top condition as per standard, new oil and seals and maybe new springs. set to standard. and work from that point.
2. Chuck some cash at it and buy the best stuff the rules allow.
The cash unlimited option is maybe not reasonable so do the stuff that it realtivelely cheap to sort out the standard issue stuff to get it as good as you can.
There are still quite few variable you can fiddle with cheaply. Document every thing so you know where you started, what you changed and so on. If you think you have gone wrong you can back track.
Racing is about confidence i.e. knowing that the thing is gonna stick to the track and "feel"
If you need someone nearer home maybe try
www.reactivesuspension.co.uk they are on the far side of York. (maybe not that near then!)
Ray