$380 for each (inc of installation & the chip for controlling) at a small shop in IMM. can't remember the name. just next to carpark exit (glass door) at level 2/3
not sure about colour but there's a catalogue with all available colours. i chose white cos it's close to ceiling colour, to bland into my ceiling.
may not be the cheapest in town, but too much a hassel for me to go ard s'pore to compare prices (you decide: time spent vs amount saved)