Hi Ian,
you’re not getting much of a response to your question are you? I remember seeing a few of these around in to 60s. All I have been able to find you are a couple of adverts from 1955. These were well liked models in their day, and now seem to be as rare as hens teeth.
The only advise I can give is to follow the “look” of aerokits models of the time which are much more common, and pictures should be abundant. You could start by looking at the Sea Queen re-manufactured by Jotica.
Good luck with this, I’m sure many of us would like to see how you get on, perhaps a few photo from time to time.
Chas