Creating a TEST system of Service Desk Plus

Creating a TEST system of Service Desk Plus

I am looking to create a test version of Service Desk Plus so that we can start the upgrade process internally.  We are currently on v 9.0 Build 9041 and are looking to get current.  Where can I find the install files to build the test system at the same version we are currently running?
              New to ADManager Plus?

                New to ADSelfService Plus?