I don't know about 'dominator' lights but quite a few people have changed lights for cheap Ebay sets with success. Many kinds available with a quick search as it is a quite simple swap with often little wiring alteration.

However you have to check that they are brighter, that they have a proper beam spread (some do not). Things you also have to watch for is that the extra power draw is not too much for your wiring, that the plastic lens does not melt with the extra heat and that it is designed for left-hand side of the road in UK! Otherwise the beam can be aimed the wrong way. If you ever have an accident with after market lights that do not conform to local standards the insurance, including injury insurance can be invalidated.

So although it is easy enough, check the details, seems few do that. There was a post here about someone did that to their Pulse but it is hidden somewhere amongst lots of Pulse posts many of which go in circles, you will have to read them all!