Honda-SOHC

Well after an enormous pause ( 2 years) in the restoration of my 1973 cb750 k2, I guess its time to get back on track..... having dug out the crankcases.... I need to find a source for "cloud silver" in the UK.. Hmmm.. I dont want to do the cases with a rattle can, as any potential fuel leaks will just wreck the job. Hmmm.. I have a compresor and spray guns.. just need a source for cloud silver... Hmmmm... any one solved this one? Although it is a concourse restoration, I am getting to the point of "near enough will do" but everything else  (so far) is perfect it would be a shame not to get the exact colour. hmmm. (notice how I spelt "colour" that was to put folks off from the states telling me where they get it from!!! lol, no one will ship it by the way!)
Ah well, maybe someone does know where to obtain this, and will tell me in return for a vey funny joke about Jordan (katy price) that is totally NOT politically correct...... one never knows...