Jeffrey, just a thought, if you can give us some info on the engine....make, model number/serial number etc, we could do some research and find out what carby/air cleaner were used. The throttle control would be the same as most petrol Scotties of the time-frame 1950-1960, and so relatively easy to source. I have a feeling that engine may be a JAP. Am I correct?
Hoping we can shed some light on it...
cheers2
PS. When are you coming to pick up your 'Magister'? grin

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin