I believe my neighbor's landscape rake has gauge wheels on it. If it is not storming tonight I will try to get a pic of it for you.
But, I am thinking if you have a FEL or box blade, that might be the best tool to use for moving the gravel initially, then spread it level with the rear blade. That sure would put a lot less stress on that blade.
Try not to laugh at me too hard, people, but when I built my pole barn I didn't have a tractor. I put more than 20 tons of gravel in the pole barn with a shovel and wheelbarrow, then spread it level with a rake. I have also done that to fix the driveway. Thankfully not anymore! However, that does make me wonder if a landscape rake would be a good implement to use to level the gravel? Would that be better than a rear blade?