Is it possible to bulk reassign the buyer of cancelled, closed, or finally closed PO's?

I've run "Reassign Purchasing Documents" to bulk reassign the buyer on all open PO's and Agreements from buyer A to buyer B.

However this has left 100's of orders still assigned to buyer A that are closed, cancelled, or finally closed. Is there a non-manual process that exists that would enable us to change the buyer on these closed PO's as well?

Additionally - is there a process that exists that would allow us to bulk change from buyer A to buyer B on requisitions? Seems that the reassignment job only includes purchasing documents and agreements.

Thanks,

Sean