Possible ways to export Campaign Approval history?

Hello,

I've recently been working with clients who have a requirement on collecting approval history for their internal audit purpose. Currently,  users can view the history of all campaign approvals on the homepage screen of Eloqua under the Approval tab but aren't able to find a report to export this history anywhere. I've looked into the Audit Log as well as different Analyses in Insight but couldn't find a solution. Does anyone have similar experiences and can share possible workarounds for this? Thank you.