SAP B1 Create Purchase Order from Sales Blanket agreement

Hi There,

We person Sales Blanket agreements with customers and we ever acquisition each items from Overseas vendors for broad statement its. In the past we utilized to make Sales Order and make Purchase Order from it. But income bid does not enactment precisely similar Blanket Agreements for customers who person blankets.

We bash not make Purchasing Blanket statement with Vendors. They nutrient everything arsenic per bid and vessel straight to my warehouse. 

How bash I make Purchase Orders from Blanket statement and person narration representation showing the relation?

Thanks,