Wave in japan makes Dolls Eyes that will suit Anime figures, but they are in 1/6 scale and only a few choices of colours.
Learning to paint anime eyes takes some time and practice, best practice a LOT on paper.
Here are 2 guides:
http://codyscoop.com/ht-eyes.html
http://www.geocities.com/Tokyo/Club/8885/eyes.html
There is also another problem with Anime eyes, each cartoonist has it's own way to draw eyes and it is kinda a signature. So using decals might make the fig look a bit strange to guys that really know Anime.
For paints I use a liquitex colour set that is sold by Wave in Japan and has all the standard eye colours in small bottles.
HTH.