Posted this in ckiang's poll on the number of camera bags. I am very happy with this design, and my friends all though it is cool. Used it a few times already for outings and the comfort and convenience this provides cannot be over-stated.
Not sure if the work belt can be found easily in Singapore, but you can always use a normal belt.
By the way, Tweek will be visiting Seattle next month. You might want to see if he can buy one here for you.
The belt shown here is a Craftsman brand and the price is US$15.99 plus tax. I have seen the same belt from another maker at US$12.99. The pouches are US$9.90 each but you might prefer to get them in Singapore as they should be pretty standard.