I think what you want are the 190 hp injectors. PDR sells them, and probably also Piers' new shop (Piers is no longer involved with PDR).
One thing though--do you have an EGT gauge? With a turned up pump and stock injectors you can probably get away without one, especially if you have other mods that would tend to lower EGT (advanced injection timing, free flowing exhaust/intake, etc). But add bigger injectors, and you're looking at significant EGT increases.
Mike