Where to buy 3G alternator wiring kit?

Hey guys, got myself in a bit of a pickle.

Car went out on me in the middle of the road after it started to flash the battery and e-brake lights. It happened around a month ago but then resolved itself, but it came back again today and fucked me over. Just replaced battery under warranty, so I don't think it's that. I'm pretty sure it is the wiring going faulty due to the vibrations caused by the engine, and not the alternator (although that's still a possibility)

Where can I buy a new wiring kit for the alternator? Bettery to take it off from a pick n pull/junkyard?