Android 4.1.1 Jelly Bean Factory Image For Galaxy Nexus, Nexus 7, Nexus S

• Galaxy Nexus (yakju): Android 4.1.1 (JRO03C)
• Galaxy Nexus (takju): Android 4.1.1 (JRO03C)
• Nexus S (soju): Android 4.1.1 (JRO03E)
• Nexus S (sojua): Android 4.1.1 (JRO03E)
• Nexus 7 (nakasi): Android 4.1.1 (JRO03D)

The Verizon Galaxy Nexus is not on the list, as well as the Korean and Sprint iterations of the Nexus S. Still, if you have any of the above devices and wish to revert to stock, then check out the link provided at the foot of this post.
You can download the factory images by heading over to this link.