Front big brake upgrade on the cheap??

[85cizzle10]

I'm new to the whole forum deal so if I go about this wrong my bad....
I own an 85 swb c10 with the factory 1.25" front brake setup. My question is, is their a way to use other factory components that utilise slip on rotors that are bigger and possibly a 2 piston caliper. I've searched around and haven't seen anything that isn't an aftermarket setup that costs like 1500 bucks. My goal with this build outs 2 use as much factory products as possible, don't get me wrong the aftermarket products out there are real nice but not really the way I want 2 go on this 1. Thanks in advance