Also, let's be serious for a moment. Corey if you're reading this, how about making it so that Katana Dreadnaughts can be built in Deepspace? There's a Heavy Frigate shipyard there, so you can build regular Dreadnaughts but not my favorite Katanas.
The Katanas weren't being built anymore, just captured from where they were ditched. If we made it so you could build them, which makes less sense, the mission becomes pointless. You can already get quite a few through capturing, and while, yes, it's not the full 200 the same logic applies here as with things like Crimson Command, where we also have a limit of 15 on a fleet that was probably of similar size at the start of the mod; if we made the actual limit 200, there may as well not be a limit. We're dealing with a scaled version of everything, so 15 out of a couple hundred units over the course of the campaign makes them more of a unique unit like they would have been in a "realistic" scenario where there's thousands or tens of thousands of warships flying around the galaxy. It's enough to make a reasonable "Katana Fleet" or "Crimson Command" without them being disproportionately present.