Shopping Cart/Add To Cart Oscommerce Custom

Needing a non-standard shopping cart/product attribute system for existing oscommerce site. PMB for specific examples. Attribute system needs to be multi-layered. For instance product Alpha has three models, A, B, and C. Model A is available with plastic coating, but not thermal coating. Model B is available with thermal coating, but not plastic coating. Model C is available with plastic coating and thermal coating. Each model is available in 20 colors, available colors may differ with coating. Job details: Would like to implement a new add to cart design to product info page. Would like to have multiple add to cart buttons on the same product page (for different models of the same product), add to cart would lead to a new page with color selection. The product info page would have size/model variations with add to cart buttons. Will require modification of product info page into a table design as examples display. Full amount to be left in escrow Payment upon completion and full function test