As a fully paid up member of the “Renegades” (Australian) section, I should make a special effort to help a mate.
You want a Vokes air filter.
I am not an authority on Scott models and the optional extras and can not remember seeing a Vokes air cleaner on a Scott.
I once had a 1951 Douglas Mk 5 that had a Vokes air cleaner on.
It may well be that I could find one from the Douglas owners as I have a 1951 90 plus and have been a member nearly 40 years.
If you can send me a drawing, by email attachment if possible, plus the date of your bike, I will see what I can do.