Mega Bloks Iron Man armor
For those looking for parts they can Mego kitbash, Mega Bloks (or Mega Brands these days I guess?) has put out both individual and a "Tri-Armor suitcase" set of Iron Man 2 figures that is full of fodder! The packaging lists the figures as 6", which they are, but the helmets (well..faceplates really) will snap onto some Mego heads (as well as the Jakks MMA figures).
If you trim out the contact points on the inside of the armor pieces, they can be reworked to fit a mego body. bjack99 did something with these a little while ago with his Ultra-wolf custom.
Wont make a perfect Iron man, but a person could make a pretty cool one out of the pices none the less.
"Crayons taste like purple!"