I wish I knew! There must be books about them, or perhaps even a website. I think the problem is that many people regard fakes as less important than the real thing (when numismatically they are just as important as the real thing in my opinion). Strictly speaking, they are still illegal to own (although you would probably never get prosecuted unless you were trying to sell them as original) so it's something that perhaps people are a little afraid of confessing to! I had one chap email me once who had collected over 30 different fake modern £1 coins out of circulation. When I asked if I could write something about them on the website, he declined, didn't give his name and I never heard from him again. Perhaps someone else will know.... Are there any books or websites specifically on fake British coins, particularly those of Geroge III?