Glen Sannox is my favourite paddler David - So I'd certainly be interested in your build. I hope to build my own in the next year or so...
I have a copy of the plans from the Mitchell library, but they are very faint, and I doubt they could be copied.
Apart from that, I also have a copy of a series of articles printed in "Model Ships and Power Boats" in 1951, on building a model at 1:48 scale. These also include hull cross sections which aren't included on the drawings from the Mitchell library. I could scan those and send them via email if your inbox is a reasonable size?