OptiFast--where can I get it?

Hello everyone!


I just had my 2nd appointment with Dr.Amson today and it went alright...he was quite surprised to see my diet/exercise log and confused about why I'm not losing weight despite exercising and only consuming about 800 calories/day for the last 6 months.  He wants me to try the Optifast liquid diet using the powders for a few weeks to kickstart weight loss and wrote me a prescription, but I can't find a pharmacy anywhere in my area (around Lougheed Mall in the Coquitlam, Burnaby area) that carries it or has suppliers that do.  

Any suggestions?