OshKosh, Children's place and local baby boutiques.
There are tons of adorable options on the market right now. If you can't find what you want you could always try your hand at making your own. Check out this tutorial here. Pretty sure this is a project I will not be trying but those of you who love to sew might find this fun. Let me know how they turn out.
|So cute! Seen on Made By Rae|
|Adorable little tights by Baby Legs|
|The Boss has a pair of these cupcake tights which I love|