recommend site to get Avert/Robinul

I am going to try Avert/Robinul as other methods have failed me.

I read that pharmacy.ca is a good place. I wonder if there are other sites to look for. Though it's not alot of money, it will still be great if i can save some dollars.

I live in Beijing btw, just in case someone else is from nearby and knows a good dermatologist that can prescribe.