While the commission, funding, and creation of the clone army is covered extensively in the Clone Wars series, its never really explained how the clone's Star Craft and other equipment is designed, built, and concealed. While in the movies it appears that the clones are grown with ready-made equipment in-hand, it seems like the design and creation of the star craft and equipment they use is never really hinted at.
I mean while its one thing to grow millions of clones using the Kaminoans and hiding their star system, the construction, funding, and concealment of their Troop transports, Fighters, walkers, and other Starships seems to be the greater feat. How could the Republic not notice the massive amount of economic activity necessary to design, test, and build those Starships? Wouldn't that require extensive shipyards and corporate R&D/funding?
Did the Kaminoans commission and order the ships as well as the clones? Seems like the Kaminoans wouldn't bother to give away their army if they owned an entire space navy as well as the soldiers. Did the Republic already have army and navy equipment sitting around waiting for an army? That option also seems bizarre.
Is the design and creation of the clones original equipment ever addressed in canon or otherwise?
(I guess the Venator-class Star Destroyers didn't make an appearance until Revenge of the Sith, but it still seems like they had most of their equipment ready to go, right away. Like their troop transport craft and Acclamator-class transgalactic military assault ships).