USB and 12v parts

Someone wired heated seats in the the 12v wire and it almost caught fire as smoke came from my dash.
Now I want to replace the 12v wiring because mine is fried, althoug the harness is still in good shape.

I figured I'd try to find a scrap prius and take as much wire with the wiring harness as possible, but I cant find many scrap prius around me.

Additionally, the spot beside my 12v is blank but it looks like there should be a USB outlet. Does anyone know where to find these parts?