The LaSwiss in Pacific Centre has them, but they're grossly overpriced. Time & Gold has them as well, but I didn't check pricing. I bought an Orbita Tesla winder direct from their outlet centre for about $100. From the watch forums, Orbita is apparently one of the better ones. I'm looking to buy a 3-watch winder, but they're pretty pricey as well.
edit: link to their outlet store
http://store.orbita.com/