Thanks. I found it in drugstore.com.
Will give it a try. Here is the link in case you're interested:
http://www.drugstore.com/search/search_results.asp?Ntk=All&srchtree=5&Ntt=rembrandt&aid=336064&aparam=rembrandt%20whitening&scinit1=rembrandt%20whitening
http://www.drugstore.com/search/search_results.asp?Ntk=All&srchtree=5&Ntt=rembrandt&aid=336064&aparam=rembrandt%20whitening&scinit1=rembrandt%20whitening