Spec and architecture of new Industrial Marketplace (LAMP)

I require a detailed specification document developed for a new site which I can then use for communicating my needs to potential developers and for achieving more precise bid values. The site will have the following features: Similar to: **- Alibaba - MFG - Vizseek** We need a similar site. It should have a search engine part interfacing with a separate matching server (provided by us). Familiarity with *CAD* is a plus. Solid experience with **LAMP** development is required (send us samples of your work). The interface should be as clean and simple as possible (e.g. compare **Google 3D warehouse**). Layout and appearance must be 100% CSS, and Firefox/IE/Safari compatible. Please provide your details in your messages.