Daryl,
Which Moonbeam do you mean? One of the full-size yachts, designed in the early 20th century by William Fife (see e.g. **LINK** and **LINK**)? Or the pond yacht replica produced and sold by Dave Metcalf of Metcalf Mouldings?
If it's the former, the Fife Archives currently seem to be in the hands of a company called Fairlie Yachts (William Fife was from Fairlie on the Firth of Clyde) in Southampton (**LINK**, see bottom of the page). If that is what you are looking for, it might perhaps be worth inquiring with them … ?!
If it's the latter, I am not aware of any plans other than those that come with the kit, and which would not be any help in building a wooden hull to the same shape, as there are no line drawings at all. As someone already suggested, you could buy a kit, and then take the lines off the GRP hull, although that would of course be a fairly expensive way of going about it. And then again, it would only be fair to Mr Metcalf, whose intellectual property that particular Moonbeam is.
Another option might be to see if you can find somewhere a set of line drawings for a generic pond yacht of early 20th century vintage, and design you own replica. There are, I believe, various clubs and organisations around the UK dedicated to i.a. vintage yachts, that you could contact to find out what might be available. At a guess, the Vintage Model Yacht Group (http://www.vmyg.org.uk/plans.htm) could perhaps be a good place to start?!
Mattias
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