User contact database

[dwbro1]

Here is something I'm looking to do, you guys tell me whether there is a mod or a combination of mods already available to do this or not, please.

A database of users so they can act like normal users and a special group for paid users that can search the standard users for contact information and other information.

The Users: Need to be able to have a very large custom field database that would be beneficial to the sponsors to locate them. These need to be standard so I need a way for the custom fields to also have a check box option and not just user input text fields.

Sponsor: Needs to be able to search for users that meet certain criteria based on their custom fields and display a list of users contact information that meets this search.

The users also need to be very strictly warned and approve that they are allowing for this access to be granted as the information will be very private.

Any thoughts?