Ramshackle Games have released a 28mm Armoured Bear miniature.
From their announcement:
I've just added an armoured version of our bear to the web shop. The model comes with a rider called the Ursa Major, and the bear part version comes with integral legs. The model is cast in resin and retails for £4.50. I've also put up a set of 5 copies of just the bear for a discounted price of £20.