Hi Dan-- I don't know of any Morris flags (burgees)-- none were listed in Morris catalogs that are known to exist. Generally speaking, the purpose of the flag pole was to display something personal to the canoe owner, not the canoe builder. For instance, if the canoe owner was a member of the WCHA, he or she might fly a WCHA burgee.
Listed in the Morris catalogs is a brass flag pole topped with an eagle. I know of only one example, and took a picture of it at the recent Annual Assembly. It's also pictured on page 101 of "The Morris Canoe: Legacy of an American Family".
The flag pole was placed into diamond-shaped pennant holder, affixed to the deck (bow or stern or both). Old originals can be found, but might require a wait and continual eBay searches and trips to events where such things might be in the possession of vendors. I did find two, so it isn't impossible. Robert Ross sells reproductions.
I've attached the image from a Morris catalog (from the catalog CD available via the WCHA Store)-- item #31 is the Morris flag pole with eagle finial. And I've attached the eagle, up-close-and-personal, that attended the Assembly. I failed to take measurements--- this is something that falls out of my head when I am having fun. (Stop that-- having fun! This is research!!!) But I could pester the owner of the flag poles with eagles to take some measurements. My feeling is that one could create similar poles using modern eagle finials.
Kathy