Message Listing Owner

I actually have two questions. I just reinstalled Directory Press and began setting up some listings, however I noticed there is no option to send a message to the listing owner as a visitor. I have looked all over the settings and can’t figure out where this feature gets activated. Any help would be greatly appreciated.

Secondly, after that is solved, are there any plugins available that would allow a member to contact listings on a credit or membership system?

Specifically, let’s assume someone would really like to contact our database of companies, either one by one or on a large scale. This list of companies is valuable to them and the fact that we have them all in one place eliminating hours of work tracking them down one by one is valuable.

I would love to be able to charge a third party either in credits or a monthly/yearly fee to contact these members and in fact would like to make it impossible for them to see these other companies unless they register and pay first so they cannot just google the names and bypass.

This might be overly complex for PP and require a custom solution but I figured I’d ask some of the developers here if this is possible with plugins.