DragonHeart ... I feel your pain! I happen to have 4 6/32 screws from my dear departed venture 60. I actually had to pick them up in the states as no one around here carried them. Lesson learned for those living here in England. Replace all SAE hardware with metric equivalents.
Funny that you Brits say that, cuz' here in the states, if I buy a kit made overseas (usually Japan or China) the first thing I do is go to the hobby store and replace all the metric crap with S.A.E. stuff. And God help me if I need a metric part say for an O.S. engine... trying to find metric stuff in this country is frustrating! Rich