Is there a way to copy a delivery line from one scheduling agreement to another

I have a requirement that involves creating STO scheduling agreements where the schedluing lines can be distributed to more than one supplying plant.

I think changing the Supplying plant of a scheduling agreement wihtout having to delete all the line and create it again could be a possible solution, but this cannot be done very easily as far as I know (no even a user exit).

I have gone through many ideas but I am wondering if there is a way of doing this?

thanks,

Alex