Hey Paul,
Do you have an Image Mate? I may have one. Should be a 3 piece system. Carby adapter/reducer, snorkel and filter.
If its Manual control, I'm positive I have a genuine carby to snorkel adapter and clamp only. You will still need a snorkel and filter, but its a start.
Get an image up and ill see what else I've got hidden, I may have the correct filter....:)