My daughter is a few weeks younger than Avery and I looked for something like this for a long time, with no luck. I settled for footless tights from Gymboree that cost about $5 and she wears them under long shirts/dresses. Good luck!
Hey, I am blog stalking you from Mandy's blog. Avery is so cute! I can't believe how big she is! I was just at target and was admiring the cute little leggings they have for little girls. They had all colors (cream, red, purple, etc.)