Figured out how to add a tongue to activate the doorbell.
Print the wedge in a rigid filament. Print the tongue in TPU/TPE. Both pieces have a hole in them to get them lined up and act as a pivot. Use a piece of filament to connect the two. I will be super gluing the filament to the rigid wedge but allowing the flexible tongue to rotate freely.
Once the two pieces are together just glue in place within the mouth and you are good to go. Hopefully I can get mine updated for this Halloween.
Paint the wedge to match if you would like.