a few years back I took a honeymoon self drive barge tour of the Nivernais canal in Burgundy. We booked through a specialized agency in New Jersey: Le Boat ( they have an 800 number you can look up) - they made our reservation with Connoissuer Cruises, the boat company. Connoisseur would have the information you need as they operate boats on most of the canals. And, they speak English. If you can't find info on Connoissuer, Le Boat in NJ will give you a number, or to one of the other big operators.
Good luck with the info.....cruising the canals is magnifique!