By and large, there are only two fairly secure home bases for any of the Cartels to maintain long-term facilities; within the Orion Enclave, for the Capital Cartel (so long as it remains "out of sight" so far as the public face of the government of Orion is concerned), or at the shipyard the Usurper allowed the Cluster Cartel to build inside the hollow shell of the WYN Radiation Zone. Other yards belonging to the various Cartels would be more ad-hoc affairs; with pressures from local naval and police forces to keep away from a concentration of assets in a single area.
(And even in the case of the WYN Cluster, the Orions found that their permanent facilities could end up being all too valuable a prize for the Usurper himself, especially once they figured out how to start building fish ships.)
Actually, one thing which came up in the BBS thread that I found very interesting was the choice of real-life inspiration for the new designs. Matt Sprange pointed out that, for the "wild" CA, he was looking to the F-117, with its sharp angles and such; while SVC countered that, with its more rounded surfaces, the F-22 might be a better source of inspiration for the 2500-series WYN fish ships. (Though I was just thinking that, given the Klingon influence in the fish ships' development, perhaps one could look also to the Sukhoi PAK FA when the time comes?)
Plus, once we get around to the WYNs as a faction, they would already have a number of fast units that could be worked on (since, as "regular" warships, the fish ships follow more of a standard operational setup relative to the Orion hulls, or even the "WYN-Orion" units which the Cluster Cartel exported to the WYN Navy).
And as an aside, you can technically treat the current Orion ships as "WYN-Orions" if you really wanted to; though for those of you unfamiliar with the WYNs already, bear in mind that these "export models" don't have the engine doubling trick that Orion Pirate hulls do. (The Orions take that feature out when selling them to the WYNs; but the latter don't particularly need it anyway.) They do still keep the Stealth Trait, though. (There's an errata thread advising how to handle WYN-Orion ships in
Federation Commander over here.)