No offence taken. I am very happy to be called to task as it will help the accuracy of the book. In the deJoux instance I was able to interview him about 5 months before he died and yes he did make a few one off cars. However with the cars I mentioned.
(de Joux) Buckler 1956 to 1962: About 6 cars were built
De Joux Special 1961 to 63: Also know as the ferrari 2 were built.
de Joux GT 1958 to 1960: 3 were built
Mini de Joux 1969-1972: 20 cars were built