Not sure where you got the idea that such a file exists ... it does not. There is a file for matching similar aircraft types, but not airline callsign prefixes.
I thought about adding such a file, but I realized that it's pretty rare that an airline actually changes its prefix. And when you fly online for DVA, you're supposed to use DAL, not DVA. (At least that's how it was when I flew for DVA.)
Not to mention, you can always duplicate the DAL rules in your .vmr file using DVA if you really want to.
-Ross