Perhaps it's a bug, perhaps not. But NPCs flying a certain ship is the best example of proper ships for PCs to fly... It could be a bug that no Blood Dragon bases sell the Chimaera. The Blood Dragons certainly have the designs and schematics and facilities to build it. Setting up characters and their ships is semi-OOC anyway, because there are so many ships in so many places that one faction should have access to, but doesn't for whatever reason.
And by that definition of ZoI, many non-House factions have none, or have it limited to one guard system. Outcast ZoI would be Alpha, Beta, Eta, and the guard system (Omicron-85?). Mollys have Londonderry and Dublin. Hackers just have Vespucci, since they don't really 'control' Magellan. Most civilian factions have no ZoI, even though they may have ships flying all over the place. The GCorp has no ZoI, I think, because they're not trying to be the GMG 'House' (because GMG is almost a House in itself) faction. They're GMG who operate, for the most part, outside the bounds of GMG space.