EPM backup of Outbox files?

Our EPM system was implemented last year; as such, we had a consultant at the time use data integrations to load the budget to the GL in ERP. We now have need of the load file for auditing, but he does not have it.

We do have backups from around that time period, but when I restore them, it appears the files are not included. Is there any way to retrieve them otherwise? Ours are purged after the standard 60 days.