Osmanthus Flower can be purchased from local Chinese Medical Hall like Hock Hua (福华), Bees Brand (蜂标) or etc. It come in either small or big packet from S$4.00 - S$6.50 depending on the size.
OSMANTHUS HONEY TEA
Below is a quick recipe for Osmanthus Honey Tea which is beneficial for detoxification and beauty maintenance as well as relieves bad breath. For your interest there are also a few Osmanthus related recipes shown below in my recipe site for your reading too.
(Serve: 1 | Preparation: 2 minutes )
1 Teaspoon Dried Osmanthus Flowers (桂花)
1 Green or Black Tea Tea Bag
2 - 3 Teaspoons Honey