Mums R us. Sorry I dont't have the address with me right now. Maybe google them. i think it is www.mums-r-us.com or something like that.
Mine is the wrap with the 2 circular hoops - the lady who sold it to me was very nice and showed me all the styles I could use with it. She also said I could go back to her shop if I forget how to use it (as I bought it before baby arrives)