Diggit Drupalextras

I have the need to allow users to request access to nodes of a certain content type.

I am using Content Access (http://drupal.org/project/content_access) + ACL (http://drupal.org/project/acl) to allow per-user/per-node permissions.

But I cannot find a module that lets users request access to a node.

I was going to sit down and write the module myself- but would hate to re-code the wheel. Has anyone run into a module that provides this functionality?

Thanks

Justin