Custom Design Software

I need the best of the best on this project. Please DO NOT apply if you are good ... I need Great! I need a system designed that will allow visitors to custom build a model for custom built lockers. A visitor of our website will need to be able to select the type of wood they want to use ... the color of the wood, shelving, hanger rods, drawers, shoe shelving and a shoe turn table. They need to build this model on our website to see what it will look like, before they order it and have it shipped to their home or business. A Couple examples of the same type of business is ... [login to view URL] ... Click on "Design It" ... Then click on "Add Unit" and start building ... A Second Example is ... [login to view URL] ... Click on "Get Started" ... then click on "Get Started" and begin your build. I also need whatever is built to be integrated into XCart Shopping Cart System. I need this program built and I need it integrated into XCart.