if it's 3.5mm to 3.5mm, it's not an adaptor; just an extender. did you really want male-to-female or male-to-male? don't worry, i won't sexually discriminate.
checked ACE hardware, they don't have them. CDRking branches are out of stock. oh well thanks anyways
i think what you want is a male-to-male adaptor. as rbenzon points out, the item in your picture is just an extender. i forget where i got mine, but i have two of them--one generic, the other belkin. try the electronics and stereo shops.