Interesting where can one get this product and the trick(s) associated with this?
The prop is around $20 at the various magic websites.
The earliest I can find the effect in print is in T. Nelson Downs's "The Art of Magic" (1909) p. 298. There are instruction for how to make the egg skin but I would drain the yolk and white out before rather than after. Also, Downs recommends using a regular egg, I would use a duck egg. He actually recommends using alcohol to store the egg and performing the effect with the egg "which must not be dry."
So based on that,
I'm changing my advice to do it dry to use the egg wet. That was based on the older method where the egg was in talcum powder or cornstarch (which kept it from sticking to itself). The alcohol serves the same purpose. I sort of laughed that keeping it in alcohol isn't a new idea, but an older idea.
Probably the most known write up is in "Magic and Methods of Ross Bertram." That is credited to Max Sterling and and Harry Schilling. I don't have it but I'm trying to track down a reasonably priced copy.
I also found a write up in a book called "The Magic Handbook" by Peter Eldin called "The Sterling Egg."
The routine is that a balled up piece of paper turns into a real egg or an egg filled with confetti or even a selected card. The other props you need would be a fan or a glass... like a wide champagne glass and the egg that appears at the end of the effect.