The books you list above is exactly what I also want to have.
We already know, Franklin is going to re-issue both volumes of the Netherlands and Hanoverian correspondence.
If I didn't get it wrong, The Dutch-Belgian cavalry at Waterloo was self-published by the author. Here is the site of the book, which I found by chancehttp://decavalerie.blogspot.nl/2008/05/ ... -andr.html
Since it's out of date, I tried to write him directly, but the e-mail he left at Napoleon-series didn't work any more.
Fortunately the material Andre Dellevoet used is shared by Erwin Muilwijk, Ronald Pawly and Pierre de Wit, whose works are still in store or can be accessed from the web.
Cowards at Waterloo? A Re-examination of Bijlandt's Dutch-Belgian Brigade in the Campaign of 1815 by Andre Dellevoet from Napoleon Journal #16 is a gem of his study, highly recommended.