need help casting a head

Posted in Custom Workstation

My gf's ex friend snapped and stole the head off a custom Final fantasy 7 cloud strife I made her so I want to make a new one for the figure. All I have is the newer one which has a lot of undercuts in it. Is there a way to do this while making it easy to remove? I was thinking of doing it so the problem parts face down so teh head would simple lift out.