Well, I'm not sure from the posts whether Midwest is making a roll over box blade or not. I called and the first time they told me no. The second time they said yes. So I just don't know for sure.
The roll over box blade, in my opinion, is the hands down better than a fixed blade. I have cut driveways, cleared building sites, cut trails through the woods, spread gravel, etc. You can change from cut to drag on the seat. You can also do 2x the back dragging by dropping the FEL and the box blade turned so the blade drags, not cuts, and get things done fast.
I think I bent mine by turning it and as I put it down to cut out side of hill for trail, it caught a stump. I don't think I had one side locked into the tine, and it twisted the whole blade. It really is HD, but I'm pulling it with a 60 hp, 6700 lb machine in 4wd.
At any rate, I will keep looking around. And by the way, the link posted above did not work.