Hi Phil,
There is no pre-built management pack, but it's possible to write your own management pack for MOM or SCOM to query the SEPM's health. This article may help:
Can Symantec Endpoint Protection Manager be monitored by Microsoft Operations Manager (MOM)? (http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2008061622510548)
Another thought, completely untested and unsupported but just might work.... I understand that SCOM has the ability to collect events from Syslog, and the SEPM has the capability to export events to be parsed by syslog. For information on SEPM's External Logging capabilities, check out the admin guide and SEPM built-in help!
Symantec has its own tool to store, manage, query, etc the logs from many computers- Symantec Security Information Manager. You can learn more about it here:
http://www.symantec.com/business/security-information-manager
Please let the forum know if there are any additional queries!
Thanks and best regards,
Mick