Diana Kennedy is my main source for Mexican recipes and procedures. I'll try to find something for you as long as it's not an emergency.
I haven't found any recipe that call for Chipotle pepper to be smoked in banana leaves, but why not. That's what it all about, mixing flavors. I say go for it. It may take longer as the peppers are usually smoked/dried over peat. If you looking to like smoke/cook to tender, then I say go for it.
Diana Kennedy mention in "The Cuisines of Mexico" that Chipotle Chilies are smoke "under" banana leaves but she can't find anyone to confirm this, it says on page 39 of the book.
I have the hard back cover of the book copyright 1986.