Purchase Orders - Allow Goods Received Notes to be used for Free Text Items

We do not hold stock due to the nature of our business (school) however we use the purchase order system in Sage 200. Unfortunately we are then unable to update the Confirm Receipt as we are inputting the orders as 'free text'. They are just not there, but we are receiving a set number of items from say a stationery order. We are still receiving Goods Received Notices but have to update the Order Notifications section. It would be good if we could use the 'Confirm Receipt' area to record our GRNs.