If there is an update available out there then you can find them, there are no guarantees unless there is a so call freeshop type of collection dumps out there, then you might or might not be able to find it. Nopaystation and LoOzers PSN stuffs they doesn't include update, so your luck is to looks for them online.
Sometimes you can find older versions of updates for speed runners (like Dark Souls for instance) and the like, but most of the time you'll just find the latest updates or none at all if they are unnecessary
also doesnt Sony have their own unblocked cdn?
use "ps3tools_4.8.1", click "ps3 game updates", type in the games title id, and then select what package you want to install.
(can't think of any game that benefited from not having an update installed on ps3)
(as for the vita, "world of final fantasy" if you didn't like the "auto heal" option added to save points, game was already kinda easy, that may of killed it)