Hahaha! That's a fantastic idea! I'll have to rig it up on my phone or something!
Fabric, fabric. Well, you're in luck, because you can see through most normal fabrics pretty well, especially if they're black. I'd go to the fabric store, drape some over your head and test how well you can see through different fabrics! Might be useful to have someone with you to tell you if they can see you through it too, as when using too-transparent fabrics camera flash often goes right through and reveals whatever is behind them. You should be fine with a medium weight drapey fabric (the drape helps keep it close to your face, the closer it is to your eyes the better the vision), just see what works for you and stay away from chiffons unless you're layering them up a lot.
Hope that helps!
I'm doing what will hopefully be the final Space Pope assembly this afternoon so I'll have photos of the finished suit up as soon as I can get my housemate to snap a few shots