Another recommendation for Ruby Photo.
Excellent shop. Very friendly and knowledgeable people.
They offer Ilford, Kodak, Fuji (negative and reversal films) and AgfaPhoto films (including the excellent CT Precisa reversal film).
Besides Ilford BW paper and BW chemicals.
Furthermore another good source is the Lomography Embassy Store in China Town. This store is run by Meerly Wang.
They have a good range of films including fresh Provia 400X and AgfaPhoto CT Precisa.
This nice shop is located in
295 South Bridge Road #01-01
Singapore 058838
And then, last but not least, we have Lo Sheng and his excellent crew from "The Analog Film Lab":
https://www.facebook.com/analogfilmlab
They have recently invested a big amount of money in a complete new E6 dip-and-dunk processor to deliver top-notch quality processing.
It is a lab from enthusiastic photographers for enthusiastic photographers.