Steampunk Bobarian Fett Helmet
Steampunk Storm Trooper Helmet
Steampunk Imperial Steam-Walker
Steampunk Viking Boba Fett Helmet
Steampunk Junkyard Bumble Bee Helmet
Artist Paul McCue took a collection of Star Wars / Transformer toys and gave them all a Steampunk makeover. The wearable helmets and AT-ST Walker are available to buy at his Etsy store for a good chunk of change.
Geeky Steampunk Gear by Paul McCue (Etsy) (Twitter)