Create a program to connect Zencart to Australai Post Eparcel program.

I need a program written which will connect Zencart to Australia Post Eparcel. I need someone who has worked with the Zencart before. The program will use extract customer postal information from Zencart and then load it into Australia Post Eparcel. It will also automatically email customers their tracking numbers from eparcel. All documentation from Australia Post is attached. This job will be needed within a few weeks time. I will escrow 35% of project cost and that along with remainder will be released once project is fully tested and working. If you have any other questions, please don't hesitate ask. Best regards,