Simple rule in life.... There is always someone who does it better...
Check it out: Phillybri used to have a band: Resonance
But he's soooo over them now!
Like everyone has said pickups won't get you the pinch harmonic, technic will. You can pinch harmonic on an acoustic if you have the technique down.
My advice to to focus on the thumb/picking. That's where the magic happens. Instead of hitting the string with the pick like normal, try angling the pick a little bit. Then, dig/drag the pick along the string as you go down instead of just getting a clean note, then the overhang of your thumb on the pick should essentially hit the string which mutes it. Thats when you add the vibrato to the note you're trying to "squeal". Try it on an open string to get your right hand down before having to worry about your left. The D string should be a good place to start.
Paul Reed Smith 7 - S t r i n g A c t i v i s t | Fueled by P T C