I was looking to do the same think on mine, but after finding a used plow blade and looking into the cost of making the mount...
I realized i could put a brand new Rear Blade on just for the cost of the used plow blade and then I could both, plow with the rear blade and move snow piles with the bucket.
FYI...there is a used 7.5' Fisher Plow for sale here in VT $300