Sounds like a great idea!
I'd love to know how it turns out if you do try. I would think you would have to use wire to initally make the frame then cover with clay. Maybe you could get the nose pieces and side hinges from a pair of sunglasses. If it were me Id try it out as inexpensively as I could first, just to see if it would work. Plese post back and let us know!

I think I have part of the original glasses, Maybe I can use some of that. Thanks