With Oscommerce MS2.2 :
One product can have several suppliers.
Supplier's order can be make automatic according with customers' orders.
Shop owner can choose supplier if there is several supplier's products.
Shop owner can wait for several customers' orders before make suppliers' orders.
When supplier order is ready an email will be send to him.
Supplier can access to an personal page with login and password.
Oscommerce will save when supplier accept order, when supplier produce it and when supplier deliver it.
This tool is only for shop owner. Customers won't see anything.
Suppliers won't know customers names & address.
This tool must be easy to use, in order to make easier supplier's orders.