After many attempts at this display, I finally found a mannequin which is VERY close to Chris Reeve's build and proportions. It makes all the difference when you can display the costume on a correctly sized body.
I've got to figure out the best way of attaching the Chris Reeve head sculpt onto there, but for now - it's cool to just display the costume like this.
I just need to rub down the nipples a bit so they're not so prominent!
Here's the pic: