A.C.
Possibly worth the ride to Six Flags outlets--they have a nice Motherhood Maternity outlet there. You might want to call first to see if they have them in yet.
There are also some consignment sales coming up in the area--plug in Maternity on craigslist.org for info.
Why not just ask around to friends, family, and coworkers to see if someone has one, most likely it would be gently used. I know it is the type of thing I would love to pass on to someone else to get good use of if I had one sitting in the closet!