some $$ suggestions are
American-French Genealogical Society at
https://afgs.org/site/they accept research requests.
and
the website of the New England Historic and Genealogical Society:
americanancestors.org
you can subscribe to their online site, and they also accept research requests. Some years ago, not everything that they had on microfilm was online, but I don't know what the status is now. I haven't belonged for many years.
I suspect afcgs.org would be a lot cheaper for research requests. Start there if you go this route.
