oof
I don't believe those are recoverable. Do you have a recent-ish Sandbox that you can maybe pull the info out of? I don't think you can directly recreate the statements, but at least you'd have a record of what was cleared, etc.
Oracle does have backups, but it's really only for catastrophic stuff and I think the minimum they charge is like 15-20k. Way cheaper/easier to just have someone re-do the recons.