Affiliate program for WP Website Recurring subscriptions multi tier

Affiliate program for WP Website Recurring subscriptions multi tier I need a comprehensive and professional affiliate program to be integrsated into our wordpress site [login to view URL] The program will be hidden and via invatation only to some of the largest health software providers across Australia. This will inlude banners and 'text links designed from our logo with the program integrated into our theme and site. The affiliate program will only be hidden from general traffic for a shoret period but this is onoly a matter of us hiding the url everything will be 100% operational. Again this must look professional and be secure with the ability to look professional and corporate PM me any Qs