Toshiba Satellite Replacement Buttons

I have an A355-S6879 Toshiba Satellite and am trying to find replacement left and right click buttons. I don't need to replace the board under the buttons--just the buttons themselves. The hinge on the left click button has broken, and the craptastic way in which they're made leads me to believe I may as well get one to replace the right as well. The problem is--I cannot, for the life of me, find the parts. I'm sure I'm just searching for the wrong things since I don't really know what these "keys" or "buttons" are technically called, so if someone could throw me a link or suggest an appropriate term, I'd be appreciative.