Ok. I simply create the entire foam Punto head...then I make a cut from the corner of the mouth..to the back of the head. (You can't use the jaw and back of the neck/lower head portion of the punto pattern for Fozzie. Fozzie's mouth is much bigger.
Then you create a 1/4 sphere for the lower jaw.
(Pete! I haven't forgotten my eyes promise! The resin ones i made are turning out to be too thin and too soft...so I am working on a vacuum formed plastic solution next) If that fails...I will go back to 3D printing...but make the eyes much more thick)