Hot Toys have all version of Iron Man (Mark III, Mark II and Mark I) available, but stopped short at Iron Monger. And if you are looking for a 1/6 scale of Iron Monger to go with your Iron Mans, Bomber Toys seem to have an answer.
This is still a work in progress and nothing has been confirmed. And as a model kit, you'll need to assemble and paint Iron Monger yourself. Obviously, this will be good for the more artistically-inclined, but I'm hoping Bomber Toys offers a pre-painted variant for people like me who are hopeless with a paintbrush.
More photos here.