This type of transformation isn't done enough if you ask me. I will try to attach some PE that I have gathered. Gamma Rai did some good PE stuff. Too bad Gamma isn't still doing art as far as I know. There is also a clip from the movie Hunk or something over at expansion mansion. The guy doesn't get big enough if you ask me.
http://expansionmansion.com/video/vi...d40eb4d8027d90
if this doesn't work then just go to expansionmansion.com and search for hunk
If you want to put up some money there is PE in Bust Artist's 4th Grow comic it is good if you enjoy comics.
I am still wanting more live action or 3d animation.