Snap Creator you can download from NOW. It comes with NGS supported plug-ins for oracle, mysql, db2, lotus domino, vmware, and sybase.
Additionally there are several community plug-ins, postgreSQL being one of them. In order to get community plug-ins you must either go through NetApp PS or join the Snap Creator Developer Community @ http://www.snapcreator.com. I think you need to be a partner to get access so you should be able to join and get the postgreSQL plug-in. Community plug-ins are supported by the community and not by NGS so hopefully this is a viable option for your customer. You can get help here or once you join community you get access to mailing list and also IRC chat, where lots of SC guru's hang out.
The community is new, we are launching it this week!