I love that line! I buy it for my twin girls here in America! I will check around for you. I also sell my clothing line wholesale so I will see if my sales reps know anything! Feel free to email me back if you need to...
You should try looking on craigslist.com. Choose the city near you and then click on the baby/kids link. (Or the clothes link.) A lot of people sell their kids' old clothes at a huge mark down.
The other great place to buy used kids clothes is at garage sales. ...Unfortunately, those are a little seasonal if you live in a colder state. You might pick up this weekend's paper and see if there are any going on.