I have a scan of one (reduced for forum posting)...
Ham Class minesweeper 600dpi reduced by
Andy L.J. Ford, on Flickr
If you need the full resolution please PM me. The detail isn't great, but at least there are sections which could be assembled into something like a body plan.
I'm also a huge fan of the Ham class
, although I never sailed in one, and I'd like to see your model when it is finished!
My interest is in making 3D virtual model, for use in PC simulation (Prepar3D), which can be sailed around or flown over. For this purpose the drawing I have is sufficient, but otherwise I'd go looking for original plans from the National Maritime Museum.
If anyone has any Ham class material and is willing to share please keep in touch. Likewise I'm happy to share anything I find.
All the best
Andy