Downloads section of connect is an area where scripts are/should be posted.
There is a couple in there which might get you started:
A script to report on backup policy configuration for particular hosts
https://www-secure.symantec.com/connect/downloads/script-report-backup-policy-configuration-particular-hosts
A script to generate reports on backup policies for a given set of clients
https://www-secure.symantec.com/connect/downloads/script-generate-reports-backup-policies-given-set-clients
Otherwise refer to the NetBackup Commands for UNIX guide and look at these commands specifically first:
bpplinfo
bpplist