Scored the second version of the Iron Monger from the Iron Man movie line today (at Kohl's of all places, apparently the best place to get Monger v2 and Titanium Man at the moment). Lo and behold, the sculpted Obadiah Stane inside is Joe scale.
The head is fixed, and mounted on a spring loaded piece so it pops up when the canopy is flipped back, but I think it'd be pretty easy to cut off for use on something else, or to replace the Stane head with someone else's. I'm just going to be keeping mine closed up, but I figured I'd pass along the info. Very cool figure, I can't compare him to the previous Iron Monger, but I assume this one is pretty much the same minus the action feature and reduced hip articulation.