I haven't tried it myself but if you have a fairly good "pro" graphics application on your computer you might be able to "capture" different angles of his head and face. Then there is the older way of taking pictures of the tv screen. Not as good but it helps in a pinch. I had to do that recently to get the correct positions of a mule harness from an old movie.
May I ask what medium you are planing to sculpt him in ? Just curiosity you know.
I've currently been working in wood. Good luck on your project !