How can I do to autocreate Purchase Order from a requisition when there is a specific item and vendo

Hi.

Here to replenish inventory we do the following sequence of activities:

Step 1 - Create Replenishment Requests;

Step 2 - Manage Replenishment Requests , to select only desired itens;

Step 3 - Load requisition with loader in Purchasing>Requisition menu;

Step 4 - Send the requisition to approval;

Step 5 - After approval we create a RFQ;

Step 6 - Then the PO Auto Sourcing, create a Purchase Order to dispatch to vendor.

Basically, we need,eliminate the step 5 for a specific item and vendor combination. But, this particular item are in the same category with others and we would not like change it.

PS. Sorry for the English mistakes, but it's not my mother language.