RB bailey has a nice winch bumper for sale in the Pacific NW. I think he has a classified on this board.
But, nice. If you want synthetic line, my friend at Southeast overland makes custom pieces.
I've got my eye open for another one of these (bought one, was a bit too much of a project, so I passed it on). I've got the winch rope for it in my garage, but I'd also like to get a 6HP motor and a solid state contactor for it. Would be a beast then.