Hmmm....don't think I've ever heard of one of the wiper motors going bad before. Yes, you should be able to get one through any of the major parts outlets. I just check O'Reilly's website, and they have one for $54 and a limited lifetime warranty.
I've got about a dozen good used units in the shop...I'd let you have one for half that.
![Wink ;)](./images/smilies/icon_wink.gif)