that's cute! i've seen the bigger version of this bag on ebay. Good luck!
I believe the model number for the smaller treasure bags such as this is "146002", you can try doing a google search for availability, but Emald is right, this model is no longer produced. Best of luck!
Here is mine...I LOVE This bag and carry it like crazy. It sat in my closet for over a year and I almost sold it a few times and now I carry it like mad!! LOVES IT!