Post-Apoc Gladiators - Pit Beast

This is another of the Urban War Junker Gladiator figures - In this case, a large ogre-sized Pit Beast. Normally it would have a boar-like head, so I'm guessing that it's the result of either mutation or genetic engineering - the only problem is, the head was missing from the bunch of figures I traded for - I'm looking for suggestings as to what I could use in place of it...

He's now been pinned approximately 8 different times - the arms and hands were seperate to the body. I ended up using an old action figure base for him - seemed to fit perfectly!