A quirky game that hit the video game scene a few years ago was Katamari Damacy, a simple yet inexplicably fun game about rolling a mound of random objects into a huge massive ball of mayhem. Starting as a small ball and picking up objects in your path, you roll your ball larger and larger until you can absorb larger objects like the Lego shark or horse pictured here. This Lego Katamari Damacy scene accurately recreates the sheer terror of the poor Lego citizens as the monster ball rolls around the street. Besides the shark and horse, careful inspection of the other Legos absorbed include a Lego minifig with crazy sideburns, a parrot from the Lego pirate set, flowers, fences, and a very enraged Lego man! You’ll also spot the Katamari Damacy prince minifig at the bottom right, with his block head quite naturally suited for a Lego interpretation. Hopefully he satisfies his father and completes the level with this monstrous Lego ball of stuff!
Fraid the only thing I know of is some paper box models you make yourself.
You could try ebay.