Would anyone be interested for about 50-75 more,  for me to pour an 'inside the body,face,hands,groin' foam filler piece that would make the piece firm once put in for mounting.  I would mold release it so its in parts shipped.  But can be lightly glued in,  and would make him rock hard.  Each one would have to have a custom piece made for it.
You can of course do this yourself,  for around $25 with expandable foam from the hardware store,  you just ahve to be careful.
It will require some trial and error,  and materials, an labor,  but ive had a lot of mails asking for it.