When I was shopping for my Grenadier I considered adding the factory front receiver - I use a receiver-mount winch on my three Jeeps and planned to use it with the Grenadier as well. Unfortunately the factory front receiver is only rated for moving trailers around, it's not rated for as much force as a winch can provide when getting the Grenadier unstuck.
So I ditched the idea of adding the factory receiver to the front, and decided I would need to build my own receiver as I've done for my Jeeps. I've designed and built "quick install" receivers for the front of the Jeeps which bolt in place/remove in minutes - since I only need a winch (and therefore the front receiver) when I'm on an expedition, I can install the receiver and winch just for that expedition and remove it for daily driving when I return home.
I've designed a quick install front receiver for the Grenadier and I am getting ready to build it. These are the main materials that will be used... a Reese Class IV (10,000 lb.) hitch for some pickup and a piece of 3/8"-thick steel angle:
It'll go together approximately like this - the steel angle will be cut into brackets that attach using the bumper bolts that are behind the plastic trim on either side of the center of the bumper. The Reese hitch will be cut to fit between the brackets and welded to the brackets; there will also be tabs in the back which have holes for bolts that go into factory holes on the top of the bumper into the frame. I'll have it powder coated once it's built.
Installation will be simple - remove the two plastic trim pieces (4 T-30 screws on each side), remove the 4 bumper bolts into the frame on each side, position the hitch to replace those bolts and tighten them down. Should only take a few minutes and removal will take about the same time.
I'll install it just for expeditions where I might need the winch and remove it when I get home, same as I do with the quick install receivers on the Jeeps.