Bonjour Kristian
Are you still looking for information about Louis Coulombe? Maybe I can answer some of your questions.
I dont know if the book of Paul Coulombe is still on sale because I had a notice, few years ago that he wanted to sell his books. He might be old enough now.
I work about all the Colombe coming from the region of Lanaudière (ancient seigneurie de Berthier) but I have a lot of information about Le Neubourg and the pionneer Louis Coulombe. Il cannot translate all those in English but I can answer few questions.
Au plaisir,
Pierre Coulombe
Montréal
zepc@videotron.ca