Is there a way to locate a Model file for a custom operational report?  I was researching another report when I noticed that a previous report is no longer listed in our Project.  I can locate the schema (xsd) and rdf files but the model (.report) file is no longer showing.  The report is deployed and is running.  Is there a way to get the .report file back/recreated?  We do not use the build_home concept for our custom objects.