I think it's possible, I've been in the 1500, 2500 and 3500, so I'll have a closer look when I see them together again. There isn't anything dramatically different about the front clip between them I don't think.
I don't think it will work, not at least without replacing the front bumper as well. If you look at the measurement, on the front, just under the headlamp assembly on the 1500, the offset from the bumper and the piece under the headlamp is about 1in. On the 2500, its about 3 inches. The 2500 is up higher off the ground. The middle bumper part sits lower, so the grill is taller, and the side piece under the headlights makes up the diffrence.
You might be able to combine the horizontol chrome bumper with your endcaps and an aftermarket replacement grill designed for the WT trucks. The end caps are paintable so you can pain them to match or leave them black.
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