We have docking systems at CYVR, but you need to install GSX to get them. Of course, this will work even if GSX it's in Trial mode, since it's entirely free to use at all our sceneries.
We decided to move all the GSX-related features from the scenery installers to the GSX installer. It make sense because, before GSX, all installers included the same copy of docking systems models and textures, and this is making each installer larger than it could be. Instead, downloading GSX will install the same stuff only once, saving time and bandwidth and besides, with GSX being free, there's really no reason not to install it, if only to be used at our sceneries.