Am at RAF Halton on DI course at present, was trying to be forearmed before getting fobbed off by my suppliers when I demand one when I return to my unit. Cannot find any info or lists with any numbers on down here, it appears to be knowledge is power type of thing, that or they all bought their own racers, and dont know the numbers either but i cannot afford a racer at present. Would have thought they would have been easier to track down, but that's the modern military for ya!
Regular RAF, volunteered to help out unit, armourer by trade, something different, strings to the bow if you get my drift. Many thanks for the recommendation, will have a gander and see what I can sort out.