Land Rover bumpers
I mounted Land Rover Military bumperettes to my m416 bumper. They match the ones on my army Rover. Not sure they add a ton of protection, but they help a bit and give me another place to stand when tying down the kayaks, etc.
Plan to repaint them and the frame of the trailer black to match the Rover better.
Like you, I'd love to also mount a 2 inch receiver to accept my Yakima bike rack.
Here's a picture of what I did - sorry I don't have any close ups handy.