A Dragonised T-Rex remix. Created For T-Rex remix Contest.

Pull the Jaw and mount from the base Thing http://www.thingiverse.com/thing:308335
Update (I added them for ease of printing.)

I added a split version for ease but will Print fine standing with support. A print with ABS and will weld the two halves and fill in any gaps with liquified ABS then Treat the model in an acetone vapor to smooth, then paint.
With PLA you can just glue. SLA/LCD Resin just print the full part Have fun.