Addons membership Osc

Hi all ! I need addons for OsCommerce : Membership. User register can select is membership or no membership, if choose membership they need pay via paypal or ..... U can check demo here , i want like this site but not this : [login to view URL] I want include to register page current, no use another form. only include check box in register page current ( [login to view URL] ) It show in create_account.php. If user no choose membership, they can update in "Your Account" and can Cancel Membership. Must include in admin page about config, edit membership of user, i can set fee of membership in admin page. I need done in today or tomorow. Let me know about cost. Thanks