Online Tshirt design tool

Hi there, I need a Quotation for a design tool (like [login to view URL]) so that customer create there own tshirt / mug or what so ever. They can order that, pay it, and we receive the order in backend. (big image / eps) for printing. another thing is can u integrate it to opencart . i think this will be great . i want it make like [login to view URL] , combine with opencart , create a tab custom tshirt design and integrate the tool there. by the way , if u can fullfill the task , in future i will got lot of project cause i am 1 of the top sales computer shop so i got lot of customer looking for web project . if the first deal is good then we can become long term partner where i can have around 10 - 20 project per month. from alvin