It might also be worth contacting some of the national Memoir 44 groups.
M44 Brigade is the Dutch group which produced the excellent crib sheet of rules. And knowing the Dutch, they will speak good English!
Many of the sceanrios mentioned above by KianV are by jdrommel, who I assume is French because a lot of his scenarios are used in the French Open, organised by FFM44.
In addition, if you are logged in to Days of Wonder you can * Send a Private Message to the author - e.g. jdrommel..
Finally, might be worth contacting Brummbar '44, who does a lot of great scenarios.
Oh, I just remembered, there is a thread on this site about the Chattanooga Open. You could ask mrmanley31 if they know of any such scenarios.