Punchout with Categories

Hi Team,

I need your inputs on how to achieve below based on your experience in Punchout process,

We are implementing punch-out and would like to use category instead of defining thousand of items.

We will map supplier categories to our categories.

When user does punchout, he has to select the specific items and quantities.

In iprocurement based on the category mapped, details get fetched.

Requisition gets submitted and approved.

Buyer creates a PO

Now since purchase requisition had only category details, PO also will have only category details mentioned. (no item details)

Approved PO sent to supplier in cXML.