How to make a copy of a backup?

Hi,

I have Backup Exec create backups on a regular basis. Now, I would like to create a copy of a previously created backup, so I can put that instance of the backup into long term storage. I can't find any documentation or forum post on how to do that, if at all possible (other than restoring the backup and backing up the restored version to a remote location).

Does anyone have an idea or pointer on how to do this?

Thanks

Derec