I think Nick here would be dismayed if he knew KeyShot could replace his 5 x-ray machines :)
http://nickveasey.com/#
Well, if you can't find a 3D model you can always haul out the heavy equipment.
Ed
Haha, trying to get an anatomically correct 3D model of a lobster might be asking a little much out of a digital artist, but otherwise the rest would be easy ;)
Those are some pretty neat images though!!