Reassign Another Employee's PO Approval Workflow

Our business team has requested the ability to reassign purchase orders and requisitions assigned to other users.  For instance, if an employee terminates with approvals assigned to them, they would like to be able to access the PO or REQ workflow and reassign it to another employee.  Currently only the Worflow Administrator can access workflows for all employees.  Business team has requested facility for specific PO responsibilities to be able to access any process the following workflows:  CREATEPO, POAPPRV, REQAPPRV.

AP has a similar functionality via menu item called "Invoice Approver Re-route".  This opens the Status Monitor and all AP workflows are available to the user.  Since this process is launched via a menu item, they can control which responsibilities have the access.  Has anyone had