iProcurement and Min-Max Requisitions

 Hello, I'm looking for a best practices solution regarding pricing for min-max orders.  We are using both iProcurement and Min-Max, and sometimes both for the same vendor.  We want to get more out of our iProcurement setup.

We want to continue using min-max to generate requisitions for our stocked items, but we would like to send the electronic PO automatically and not have the requisition autocreatd by the buyer.  We are prevented from doing this only because we have to manually check pricing on the vendor's website.

How can we overcome the pricing hurdle and send our min-max requisitions/POs automatically to the vendor?  Can we integrate the iProcurement punchout to min-max requisitions?  Is there another product that keeps prices constantly updated?