There are a lot of wiring kits out in the market, but its always better to be perfectly measured by how big your car is. Go to any audio shop, and they have many guage sizes from 0/1 guage to 18 or higher guage. Costly, but best place to go. They sell audio guage wires by the foot at pawn shops as well, with the price down. I'd go there first, then see an audio shop.
