Hydroboost is what GM calls their system. Likely Ford has something similar if you want to stay blue.
There are plenty out there, used on GM 6.2 and 6.5 2 and 4wd trucks from '82 to '98, and likely beyond.
I've owned quite a few, I prefer the feel to vacuum cans, the hydro system comes on more linearly, decent feedback and still plenty of power assist.
a quick google nets:
http://www.superchevy.com/technical/chassis/brakes/0601sc_hydro/
http://www.angryamerica.com/chevelles/hydroboost.html
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