After several rounds of mailing, Sun is now delivering a new developer certificate to me
Let me summarize the procedures for the replacement.
1. Before you send the request to Sun, go to http://www.certmanager.net/sun
(no slash at the end XD) and verify your personal information if you have not visited this website for a long time like me. Just press the 'Verify' button if you have nothing to update.
2. Send cert replacement request to firstname.lastname@example.org
You need to fill your name, prometric ID (or Sun Candidate ID), cert name (exam code also) in the email.
3. Sun will reply you in 2-5 working days.
It seems there is no service charge needed for the replacement. I am not sure, at least they did not ask me.
I will keep my new 'reborn' cert in secure area. Thank you for reading my post