Yes, I'm quite sure that 6 aluminium chassis plus 2 (or 3?) carbon chassis were built.
I met in Le Mans some mens who worked at the Descartes factory, they recognised my car, gave me the photos of all the ALD cars built and some other infos.
I met also the wife of Mr. Louis Descartes!
It was nice to see how much they were still enthusiast!
I hope to meet again at LM Story 2007 and I will try to collect other information about ALD and also about surviving/destroyed chassis.