I got mine from iherb.com previously. Take a look here http://www.iherb.com/m/sr?kw=Raspberry+leaf+tea&btnSrch= .
You can get usd5 off at checkout for your first purchase if you key in my code LIM128.
Shipping is flat usd4/6 if you opt for international airmail. Takes about 10 days or so. It's my favorite shopping site!
Found the Clipper range of organic Raspberry Leaf Tea at the Pat Chun Fine Foods Store on Wellington Street. (address can be found on www.patchun.com)=> read it in an old thread
If you live in West Kowloon, you could try Three Sixty at Elements, at least I know they have Mother's Milk Tea there! Annerlys sell it also as well as a few shops in Soho. I think Bump to Babes would have it too.
Green Concepts Health Shop in Causeway Bay (Properous Commerical Building, I think--next to Times Square) has Traditional Medicinals Organic Raspberry Leaf Tea in the packet if you want it right away. Otherwise, I would use iHerb.com and buy a huge bag of it and then you'll be set. I went through a lot of this tea in my most recent pregnancy.