Copy a master page to another master page set?

I created a title page (custom master page) for the “Default Full Score” master page set. I want to have the same title page for the “Default Part” master page set. Is there a clever way to copy a master page from one set to another?
Perhaps there is a better way to create a title page for score and parts?

No, unfortunately there’s no way to copy title pages to different sets.