you know, I'd just acquire a new set of pups already having 4 wires...otherwise you're just playing with fire and
if you have things to do which pay, and can do them at will (e.g. not limited to 40 hrs/wk) then I'd just work a few extra hours to pay for a set and I bet you'd find you came out ahead on it all.
edit: OK, it's been decades since I bought any pups, and I notice that yes they are available already set up for retail (e.g. 4 wires) and together would probably run just shy of $300 for both with shipping and any taxes...ummmmm, yeah
I'd still just get a new set probably...
as a side note I love my electric with both pups with 4 wires...I have the bridge wired for series/single/parallel and my bridge setup for phase (that one I replace both pickups on) and while not as versatile my ancient Jackson Rhoads with a replacement retail distortion in the bridge position still rocks set up as above (the guitar was sold (ordered actually) as having an SH6, but delivered with an SH2...so the store that "illegally" sold it to me avoided any issues and just handed me a retail boxed distortion, and I of course couldn't resist wiring it up how I wanted (probably take a hit on that guitar if I ever sold it because of the extra hole in the pickguard and the toggle switch...e.g. it's not in original collectable condition with a serial less than 1,000)