Hi,
You have already tried to refer the steps suggested in this article
https://www-secure.symantec.com/connect/forums/recover-dba-password
Unfortunately I don't think there is any other way to recover the DB password.
You can promote this idea:
https://www-secure.symantec.com/connect/ideas/sepm-should-store-dba-password-cache-or-should-have-access-reset-dba-password-admin-embedded-d