I have a single 250 watt halide ballast and socket. Can also throw in new 250 watt bulb if you like in exchange for that PC.....Interested? If so, email me at david.matics@camc.org
I know you are looking for a dual but I have a 400 watt mh that only has 2 days use on it. I added it to my 55 but it was a little too much so I put the pc's back on and put the metal halide in the closet.