There is always Dino-king if you want combining dinosaurs.
I do like the look of that big custom, but it does look a bit like he's being attacked by a bunch of horny dinosaurs. (sludge especially)
In the comic strip it doesn't look like they want to combine and i'm not comfortable with it if they're not comfortable with it.

(while we're on the subject of combining)
http://www.youtube.com/watch?v=yqbKz...eature=related