Robin try some of the smaller seed houses. They seem to clean out the larger and easier to find seed houses first. Below is a link to one of my favorites.
Everwilde Farms
Do not forget for most beans you can buy dried beans from the grocery and plant them successfully just remember they will more than likely be bush beans. I know you like climbers.
Also i a pinch I have even bought things like peppers and cucumbers from the grocery and planted the green seeds. You would be surprised how well that works. One of the best pepper crops I ever had was from pepper seeds green out of a grocery store pepper
Many Extension offices host spring or Fall seed swaps in their counties. It is worth a try.