HIi,
You can find your cleanwipe tool in your latest SEP Installer from fileconnect. Otherwise, if you dont have, the fastest way you can request the tool is to contact Symantec Support instead of filing a case in my.symantec portal.
The link below is the Symantec Technical SUpport Toll free number. Just select the region where you in.
http://www.symantec.com/support/techsupp_contact_phone.jsp