This issue is that when you have (1) Sales Order with (2) Products from (2) Vendors, there is no way to generate a PDF Template that would allow you to send a PDF Order to Vendor A and Vendor B.

HOWEVER...

I believe that with a tool that has already been developed, there is an easy fix to this problem.

The Tool

On the Vendor and Product Pages, there is a 'Tool' located in the upper right hand side of the page that allows you to ' Generate PO for the Products below the 'Reorder Level'. See Image Below...

Once this 'Tool' is selected, you're then asked to Select a Vendor from a picklist. The picklist is populated with Vendors who have products that are Below the Reorder Level. Once selected, you can then select from which products you would like to generate a PO.

THE IDEA...

By using this 'Tool' feature on the 'Sales Order/Purchase Order Page', you can select a Sales Order and then click the 'Tool' to ' Generate PO for the Selected Sales Orders'. Once this 'Tool' is selected, you're then asked to Select a Vendor from a picklist. The picklist is populated with Vendors who have products that are listed on the selected Sales Order. Once selected, you can then select from which products you would like to generate a PO. By looking at what's in your Stock, this also helps determine whether or not you can partial ship some of the items to help expedite the order for the customer. See Image Below...