Well the easiest thing for you to do would just buy the "plug and play" charger for the controller, which would allow you to plug in into your usb port and use it (once you download the driver). Otherwise, Amazon advertises the Wireless Controller Adapter for Windows for about $40. I seem to recall seeing one in the GameStop I work at, although it isn't listed on the website. Could be worth a shot.
Honestly though I would pick a keyboard and mouse over analog sticks any day for PC gaming.