[Valiant]

The short answer is: No.

The long answer is: All of the currently supported maps are in the official release zip, a few additions are possible via this waypoint section of the forum - Rommel_final is in late beta and coming along nicely. There is no doubt from what I have read a strong effort in place currently to complete supported botfunctions that will allow additional maps to be added, along with many others either currently being worked or slated to be done.

So there is no large, external repository of such files because there is no bulk of them to be had just yet. Be patient, the crew is grinding away at the pace best befitting their allowable time for it and I can all but promise you that you'll be impressed with what they turn out if you hang tight for now and enjoy what's available.