Depends on the era/verse. Since ship building is usually built in staggered batches. You are looking at between 8-14 months depending on a hell of a lot of factors.
Mmm well they should not have moved it unless you requested it. as it is not required to have NSFW content to be posted in that section.
As a side note most of Kuat and Corellia's support facilities are spread throughout their immediate galactic area near their named planets. It was stated that all the offsite locations of the two could nearly match the main systems. Which is impressive when you consider one system has several inhabited and heavily industrialized planets with enough shipyards that it is basically the space trucker's go to ships and the other has a mock up (poor man version) of the Mechanicum's Ring of Iron at Mars.
I think its somewhere along the thousands of uniqe parts alone, which were then duplicated to make same things over and over again. And then again, its probably more, cause SOMEBODY (*cough*Trade Federation) probably patented "door entrance model 1" and other usual things we arent even think about.
That is, if the patent is still in power.
It's a matter of parallel production. I want to say several years per ship, but given that the Clone Wars raged for all of three, you can probably crank out a capital ship in one year if you're playing with fully developed infrastructure and willing to pay premium for triple shifts and importing everything which can be outsourced.
Actually it should be sitting at that ship yard when mc subordinate travels to pick them up. They could probably pick it up before terex does.
Considering Terex only gets it in 5ABY after the Empire collapses, that is incredibly likely.
Whoever can find an intact schematic for them obviously, pretty sure any records went kaput during the Light and Darkness War era of the New Sith Wars and effective technological collapse that came about due to the conflict.
I'm pretty sure the only major difference between the two ships was size, so you could really just scale the Gladiator up a bit. The hard part would be negotiating for the design of a whole new workable standard blueprint for the design with KDY.