Add a "tip" functionality/mod to an adult webcam site

I'm seeking a service provider who can code/create a "tip" functionality/mod to my existing website. Essentially, I want members to have the ability to "tip" models in a public and/or private chat room. As it stands now, the site has the basic pay-per minute functions such as purchasing credits and using them in a private chat room setting. The website is completed and functioning. Primarily PHP, html. If you have experience with [login to view URL] software that would be perfect. I need this project completed very very quickly. If you do not have sufficient time to dedicate to completing the project very quickly please do not bid. You MUST be familiar with adult pay per minute webcam sites, have experience working on adult sites, and in depth understanding of how they function. Please provide specific examples of your work when you bid. If you can't finish the project by the deadline you quoted DO NOT BID. If you say you will finish in 2 days, I expect you to finish in 2 days or I will not hesitate to cancel the project and move on. I do not have time to waste. I will pay upon completion of the project after approval of your work. Please bid wisely. Regards...