Last February I traveled through Thailand and I feel for thai spa products. They’re nicely packaged, smell yummy (thai cosmetics often contain citrus fruits) and (at least the ones I’ve tried) work. Here’s a list with thai spa stores and their products.
“Harnn” – mentioned in the Wallpaper Guide Bangkok
“Mt Sapola” – you can buy some of their products at the bootik 54 in Vienna
“Panpuri” – I’ve got their Solitude Soothing Body Balm – very delicious.
“Sranrom” – available at “About Skin” in Vienna, Babenbergerstrasse 3, 1010 Vienna. They even have body firming products containing whole chilli peppers, “to make your skin look hot”…
Sense-nature – available at the airport in Bangkok.
If you happen to be spending some time in Bangkok: there are a few thai spa stores on the 4th floor of the “Siam Paragon” (a great place to spend a lot of time & money) – if you go there make sure you have a coffee at the “true” cafe (3rd floor, room 304/306) – the shop design is great, there is wifi, computers, a design bookstore, chocolates and mobile communication tools available (all in one shop).

Photo by Harnn