Plowing...

[zombie]

The Fairlead?

[Molon Labe]

The Fairlead?

No, it's not part of the winch it's part of the plow setup.

The winch cable connects/loops (or goes through/under) to the plow via a small wheel device.  That small wheel can be removed and attached to the plow mount via a pin.

The wheel rotates as the cable is let in/out to control the height of the plow blade.   It works as a pulley system basically.  I'll get a picture of it.

[Molon Labe]

This is sort of what I'm talking about, although mine is slightly different.

[zombie]

Cool...

This is listed as the "plow cable guide... It will direct replace yours
http://www.amazon.com/Warn-81271-Plow-Rope-Guide/dp/B0041CC93O

This is listed as the "upgrade kit, and needs to be retro fitted...
https://www.warn.com/atv/plows/plow_pulley.shtml

I guess I found what you did.

Try Granger for the pulley you have now. That would be my guess.
Never mind... I found one for ya!

http://www.mscdirect.com/product/details/67326686

I think what you have is an oddball. Like an in between rig.
Is your plow a Proadvantage? or the entry level version?

Either way the one I found will work.