Acquired business assets, no backup encryiption key

We recently acquired some assets for another business however the data is corrupt and we were not given the encryption key to Backup Exec 11.  We need this data to be restored.  Is there any service Symantec provides to be able to restore these tapes?  I understand there is no product on the market that can do it without the key but am wondering is we can ship the tapes to Symantec for a fee?  Is this at all possible?