Hittman, if you don't mind doing a little bit of soldering work, that Radio Shack switch posted by mdw is definitely the ticket. It's an exact replacement (assuming you don't have the older small button switch the SD originally came with). Although as mdw said there are instructions available, you can see what soldering has to be done just by taking out and examining the broken switch.
However, if you don't want to do the soldering, Trog now sells a pack of two pre-modified replacement switches - so all you have to do is plop one in.
I've done it both ways, and really enjoyed the convenience the second time around with the pre-modified switch I bought from Trog.
