Matching Items with Suppliers Items

Hi all I need to link our Items with suppliers items. For Example lets say we have Item1 and we purchase this item from three vendors. Each vendor has his own item code in Example Vendor1Item1 Vendor2Item1, Vendor3Item1.

I want to use the matching in
1. Reporting
2. Entering Requisitions and Purchase Orders.
3. Receiving Goods

Thanks in advance.