This is exactly what I had gotten for my winch. After getting the 350 amp plugs, I realized the more important spec is the wire gauge. If your wire isn't right; good luck soldering or crimping the wires in the terminals.
I thought I'd save money by going off of Ebay on my purchase, but including shipping I ended up paying like $40. Which was the best price I could find at the time.
This time I'm not messing with Ebay, and going to Expedition Exchange:
http://www.expeditionexchange.com/superwinch/ then scroll down a bit. $35 + shipping. Not bad because it includes the dust boots! Rated for 2-4 AWG wire.
Just an alternative. They're all the same anyways, it seems Anderson has a pretty tight patent squeeze on the market. Warn, Superwinch, etc all use the same thing. I beleive it's the NA standard.