Custom Plugin Development - Buddypress

I have a buddypress community with Paid and Free membership plug in. There are two type members level, free and premium I would like to restrict the ability to "compose" private messages from Buddypress only to Premium Member, I mean: • Only paid member can contact directly by private message to the members • Free membership can answer messages if a premium members contact them but the CANNOT contact them directly. ******* Free members (PMPro levels 1, 2, 3 and 4) “private message” button is showed on user profile when the members are logged When the member click on the button, they get redirected to the url “membership levels” page. “compose” link is showed in buddy press menu When the visitor click on the link, they get redirected to the “membership levels” page. *******Paid members (PMPro levels 5, 6, 7 and 8) “private message” and “compose” should be available for paid membership levels The plugin must have add a settings panel where you can select the membership level, restrictions and redirection.