You need to join the tournament (or at least know someone from either) to just "get them." There's no SP and the current WaW campaign's maps start blank due to our purchasing loadout system, so I don't see much use in them.
Note they aren't meant for public play and as a result may not be up to FH2 aesthetic standards.
WaW did release a small map pack for public use for a few maps, but that was way back from v2.1 or something. No idea if they'd work now.