The Logitech + trip Universal Air Vent Mount is only available for sale in China, Canada and US.
My Hong Kong cousin bought it for me in China. In China, it is retailing for CN¥179 and in the US and Canada they are retailing for US$29.99 and CA$29.99 respectively. The price average out to be about S$40. If you are interested in getting this in Singapore, you can get it from Amazon for US$29.99 and they do ship to Singapore directly