From what I know, there are only a few places that you can buy Lomo cams from locally:
-Ruby Photo (Peninsula Plaza is it? Or shopping centre, I can never get it right)
-Basheer Graphics (Bras Basah 4th floor)
-Clubsnap's very own B&S
-a few other random blogsites and forums like HardWareZone or something...
Otherwise, go online lor... the main Lomography International shop and the Hong Kong based one... the only catch is shipping. But you can always do a mass order and get more people to buy together. =)