Payment Gateway for Joomla - EventBooking Component

I need to get this payment gateway plugin altered to work with a different payment gateway. There is already a Credit card payment gateway in the EventBooking system for [login to view URL] so it should be easy enough to just alter this to match the new Payment Gateway API. The API is available in PHP and just needs integrating into EventBooking, [login to view URL] PM Me if you would like to see a link to the API code first and further details. The site needs to be up and running by Friday 3rd December 10am GMT Max budget is $40 as this is a simple project that I would do myself but I have not had sleep in 38 hours!