How to move expense report from a Termed approver to another approver within the same approval group

Summary:

Back ground: We have an Auditor Approval group set up to final approve all expense reports for payment once the manager approves.

Issue: one of our Audit approvers was terminated and now has 9 expense reports assigned to her and we have no way of reassigning them to another auditor in the same group without withdrawing the entire expense report back to the original user, creating a new expense report and then having the managers re-approve the reports so that they end up back in the Audit Approver group again. It's a ton of work for a transfer with the same group of audit processors that should be a simple task but just not an available option with the current