These custom Mutts (as well as several more) are all on sale here (although the prices for some are . . . ambitious):
War Walker/Cyborg custom Mutt by Tyler Coey.
Rusted, leashed monster by D-Lux.
AT-AT by Lou Pimental.
Ghost wagon by Phetus.
*Previously: Teenage Mutant Ninja Turtle by D-Lux.
*Find Star Wars Happy Meal and cereal toys at eBay.