There is a braided fiber (like parachute cord) line that you can get to replace the wire cable. The main advantage is that if it ever breaks, it won't snap back and injure you like steel cable will. Also, you can get a lot more of it on the winch thimble and it won't mar you floor or your car.
You can get a mounting plate (actually about a 30" long piece of steel channel) from your trailer store. It has pre-drilled holes for bolting it directly into your trailer frame.
I stopped buying expensive trailers 2 trailers ago. Mine sits outside all year & I only use it 6 or 7 times a season. I always order the best hitch, suspension and axles that they offer, but I've found it most economical to just trade a cheap one in every 4 years on a new one.
