MRP - Delivery Schedule

We have a scenario where I need to plan one material number to two different unload points.

A Supplier deliveries the same material to different locations and we want to send the supplier separate schedules for the different locations. When I have tried to set this up the source list in the Purchase agreement will not allow two schedules to be entered and planned by MRP.

Therefore MRP will only generate demand against one of the schedules. I need MRP to be able to plan both schedules based on a customer number.

Any assistance would be greatly appreciated.