Reassign Purchasing Document based up on Supplier site

Summary:

My Client want to Reassign Purchasing Document based up on Supplier site

Content (please ensure you mask any confidential information):

Hi Team,

We have a requirement where in case of buyer's role change or termination client want to mass transfer buyer on Purchasing Document from one buyer to another based upon Supplier Site. As a OOB, we have provision to transfer purchasing document based upon Supplier but not on Site. So please let me know if there is any process which we can use to fulfill this requirement. I am looking for any seeded functionality to fulfil this requirement.