Getting closer now. The wheel spacers turned up a few weeks ago courtesy of a generous forum member on Dirtbikeworld
Also decided to leave my CC fork education for another day and just sent them off to my local tuner for servicing and setting up to his off-road spec.
Plan B was to just fit them up and ride and get some feel for how they behaved, but luckily I didn't go with this path as one of the piston assemblies had come apart, but not yet caused any internal damage.
I don't have any info on the valving which is fair enough as this is his business, and his rates are reasonable. Forks are in hand now, so I'm hoping to fit this all together as soon as I get some decent shed time