Hello!
I'm using eagle already for a while, and is quite usual that libraries are not existing for certain components needed, so I had to build them myself. Making eagle components isn't really that hard, and if after a couple of fast searches in google you didn't find them, it's gonna take much shorter to make them yourself than find them even if they exist.
If instead of looking for a specific device, you look for a package, maybe you have chances to find some device that is ALMOST the same as the thing you want to use, but still you'll have to change the name and pinout.
This the option I was using when I wasn't so familiar with eagle.
(look for "LED with 2835 package eagle", or "LED with 3030 package eagle").
If you have further questions in which I could help you, just reply.
