Here are some top picks.
For Hair
Moroccanoil Original Hair Treatment

The first time I tried a product with Argan oil, it was this one. For use on it's own as a hair serum, or mixed with your favourite hair products, this great smelling oil will leave your hair conditioned, smooth and fortified.
Moroccanoil also has a great range of other hairstyling and body products with the signature fragrance.
www.moroccanoil.com
For worldwide shipping, try www.hqhair.com
For Body
Khiel's Superbly Restorative Dry Oil

Much less viscous than Moroccanoil, this multi-purpose oil can be used after your shower to moisturise your skin, or as a massage oil, and they say you can even use it on your hair, although I would advise you to just keep it to the ends of your hair.
Available at Khiel's stores and counters
http://www.khiels.com
For Face
Dermalogica Overnight Repair Serum

Great for mature or dry to very dry skin.
Ask for a demonstration on how to do an at-home relaxing face massage
Available at all Dermalogica- authorised skin care centres and Aster Spring in Singapore
http://www.asterspring.com.sg/
For Anything Else and In Between
Josie Maran Argan Balm

The Argan Balm is a carry-everywhere, multi-use balm infused with Argan oil and Shea butter. Apply to dry cuticles, chapped lips, heels, elbows, sun-burnt noses and split ends.
Look out for it at Sephora
http://www.facebook.com/sephorasingapore
or find out more at http://www.josiemarancosmetics.com/