Check out this sweet, commissioned print by DAVID BENZAL!
You know how I'm a stickler about using the proper Alien Design in artwork, so there's a couple things here that hinder the piece from being knocked out of the park, in my opinion:
1) The Alien used in the print is not from 'ALIEN', but is instead the Alien Warrior seen in James Cameron's 'ALIENS'.
Furthermore, the alien image itself is lifted from the 'Aliens: Colonial Marines' video game artwork.
2) The Egg, while looking pretty sweet, incorporates the egg lip "skin folds" seen in later Alien movies such as 'Alien: Resurrection' and 'AVP'.
If I had to guess, I think the added texture seen on the egg body is from that promo seen above (lower-right). Shrug.
Here are Giger's Eggs from 'ALIEN':