Got mine from Amazon, but paid somewhere over $40.00 for a pair of 4-1/2" round LED, 27-Watt x 9 LED each. Beam lights, not flood.
But I had to cut the base or mount area of the lights with a saw-all/metal blade. The light housing is made of a very thick aluminum material. Once I cut off the bases and filed the small ridges left by the saw, the lights fit right in. The "bases" I am referring to are located at the bottom of each light housing, and each has a hole the bolt that holds the light on a bracket that allows the lights to be moved or tilted.