If you can see the bent pin you might try a mechanical pencil with no lead in it to use as a prying tool to bend it back into shape. That may or may not work; I've never tried it myself.
You may also replace the card reader if you are fairly familiar with taking apart electronics. There is someone on Ebay selling the card reader for a Sony A200. Cameras are extremely sensitive devices, though, so I would highly recommend taking out the battery first (as with all electronics repairs) and using an anti-static mat or wrist band and ESD safe screwdrivers.
Be sure to take lots of pictures if you decide to repair the camera so that you can create a repair guide!