walmart has them for $2 also but if you can go to a hardware store you will get a better quilty. i have had problems with them stripping out from walmart.
I went to Lowe's, Wal-Mart, and Home Depot and none of the worker trolls knew what I was asking for. However, I wandered around Home Depot for an hour or so and I found the Y-Splitters off in the contractor electrical aisle.