Some more useless info..
According to TM 9-2320-361-24P Dated AUG 06, there are several types of front bumper plates listed..
Here are my "real deal" findings after some research on them:
On NON winch trucks, the plates are the same top and bottom (but not side to side) and are interchangeable from to to bottom. Meaning you can take a top drivers side bracket and flip it over, and put it the bottom passenger side, and vice versa.
On WINCH trucks, the only difference for the top brackets from NON winch trucks is the winch trucks have an extra piece that is the base for the tie down bracket. It is rectangular, has 2 holes, and is welded on. The bottom brackets are the same as NON winch trucks. The function of the extra piece is to "fill in the gap" that exists so the tie down brackets sits flush on the top of the bumper. On non winch trucks, the tie down bracket rests on the top of the bumper and the bracket that holds the brush guard on.
Hope this saves some people the time it took me to get the real deal info from decoding all the different NSN's listed for them.
Bottom line, if you want to add a winch to a non winch truck, weld on the rectangular brackets to the top plates, and your good to go if you cant find the "real" winch bracket plates.