cisco firewall monitor in appmanager

I work for a small company where we use OpManager to monitor our network devices and systems. Recently, we investigated the implications of a switch to AppManager. In our opinion AppManager has more and better capabilities to monitor services and systems. In our survey of AppManager we could determine that the features we use in OpManager are supported by AppManager with the exception of monitors for our CISCO firewalls (PIX 506E, ASA 5500 and ASA 5510). In order to make the switch we require a solution for this problem.

Can anyone tell how we can realize monitoring for these Cisco devices from AppManager? I am aware there is a separate product from ManageEngine to monitor firewalls, but due to financial limitations we will not be able purge both products.