Well I went down the hardware store this morning and got 3 15W 6400K CFL's for my grow and I looked around for these adapters but couldnt find them, I even asked the guy that worked there about them and he said they dont have them. I couldn't find them on the internet anywhere either. Only your american ones I will propably go to a few more shops tomorrow to look around..
if you have a working knowledge of electricity something like this might work for you aside from the y splitter....http://forum.grasscity.com/do-yourself/654210-progress-cfl-light-fixture-fan-mount.html
well, I was at Walmart the other night and they did have 2 of them on the rack. I didn't see them before, so maybe they were out of stock. They are at the super walmarts near the extension cords and bulbs, real easy to miss.