Hi Erik,
This would require a system modification in my opinion.
Maybe there is something that can be done out of the box with the help of LogicApps/Flow.
Yet, this might be difficult as things would have to be consolidated and put into a single PO then.
Also the whole tracking of the PO and the related sales orders might be difficult.
This 'thing' might be something for the dynamics experience/ideas site.
If we can convince MS to deliver this IC PO consolidation feature then we would be in a good and save position compared to doing some extensive development here.
Best regards,
Ludwig