Hi,
Do you have access to your license agreement #? If so, all you do is call Symantec in your country (check
www.symantec.com and change to your location for contact details), and ask for them to email you the license keys.
If not...it's going to be a bit harder, but you can try calling them and asking them anyway. They will probably need to verify a whole bunch of information before handing them out.
Laters!