How to correctly setup service and production pricing for ordering to suppliers

We are currently working on getting all service parts on BPO so plants have pricing ready when they need to place service orders.  We use legacy system to place orders so we might request some interface chagnes there, but we are struggling to determine the best setups to ensure orders always pick the correct pricing.  Right now purchasing wants to have both production and service pricing on BPO during award timing so we have official document showing pricing so we find that Oracle will use the newest BPO information to grab pricing.  This is going to make it difficult to