BuddyPress.org

There’s no off the shelf plugin for this, but it is possible to develop a solution (a lot more than a workaround!):

You could either do this by having a profile type for businesses, or developing a solution around custom posts / custom fields.

You’ll then have to build your own custom listing directory – not too hard! The BP profile directory already has a built in search that you could adapt / use directly.

We are building similar in a number of current BuddyPress client projects – and Poolie has also developed a very nice listings site based on BuddyPress: http://plazaa.de