Find a real two-handed blunt weapon that could be thrustable with the 2h animation while having knockdown. Then, model and texture it. I'll personally give you a loom point. This has the potential to cause more QQ than anything else I think I've ever thought of. It's such a splendid idea I get giddy just thinking about it.
Oh yeah, add me on steam from Aldo's friends list sometime.
There's really nothing to model a two handed blunt weapon made for thrusting from. If I were to make one myself it would be weird looking since blunt weapons are usually heavy and you wouldn't think you could thrust with em. A blunt polearm would be a lot easier, but you specifically stated two hand.