Forum:KB:Where'd The Republic Get It's Ships At The Beginning Of The Clone Wars?

So this question has been running around my head for the last couple of weeks and have been trying to find somewhere to ask it. In 22 BBY During the events of the the second prequel film "Attack of The Clones" and the events leading to the beginning of the Clone Wars we know that what would become the first wave of the grand army had already been under way by request of Sifo-Dyas 10 years prior. Now we know that the the Republic and Jedi Order had no knowledge of any of this until Obi-Wan Kenobi's investigation on Kamino. With that being the case what I am trying to understand is where the Republic suddenly got all the ships, walkers, and other such equipment used by the Jedi and the Grand Army that we saw both at the end of the second film, as well as the opening events of the clone wars TV series. One such example of what I mean is, based on the rough estimation that construction of a Venator-class Star Destroyer IE the Jedi Cruiser took 6-12 months (Time frame based on the link at the bottom) they would have had to star construction of it early on. The only thing and what I think is most likely is that Sifo-Dyas also went to one or more of the known shipyards and had construction of these vehicles and it has not (or at least to my knowledge) been made mention to.

Can anyone shed some light on this for me?

Venator Construction Time Frame Source: https://www.youtube.com/watch?v=WIH5Wd2XGFQ