Add Paypal & Emails Export option to a WordPress eCard Plugin

There is a clear & standard coded WordPress plugin that sends ecards. I need to add some new features and this job can go forward because this is a product that is selling. User designs the card and choose options and hits SEND button. It's working perfectly fine. We just need to add an option in admin that enables Paypal and charge users per card. If there is a good light wight Paypal plugin (GPL) we can use and integrate with product it's fine too. But we rather be a part of my product. I believe there are some plugins to use as membership package. So we just need pay per card now. The second option we need : This plugins uses WP membership. It stores senders and receivers email addresses in database (because of logs) . We just need an option for admin that can export email addresses (+names if possible) to a CSV file (other files will be great but csv most important). Please give me 2 prices: 1- Only Paypal per card option. 2- Paypal option + export emails option This is a selling product that needs these 2 modifications. But I need 3 more changes, if this cooperation goes well, the freelancer will get next 3 mods for next project and of course for changes after them.. I mean a good work & price will lead us to cooperate for all versions of this product. * Freelancer will get 1 license as a gift. ($22 worth) It is a Codecanyon accepted product it means that the code is clean and standard. It also means that I can't get the code to anyone unless the winner freelance (or at leas who we agreed for project) Thank you for your time M. K. Asasi