Thanks mrsD for the information.
Yeah methycobol seems to be the brand name for Mecobalamin. I found the following info
*edit* (can not add links, please copy and paste the text to view)from the manufacturers.
As seen from their website Iherb** ships to Singapore if we order online. As I mentioned, I already ordered from puritan 15days ago, they say they still need 10 more days to deliver here