ddoyle,
Searching online auction catalogs would be a good idea. Bonhams, Christies, Thomas Delmar, Herman Historica come to mind. It will take time to sort through everything and learn, but it will likely help you learn. Also, printed reference material will be of benefit. The book, The French Trade Gun in North America might be of help. I would suggest to take your time, study a lot and get a plan before starting your project. Good luck.
Jim