I looked at Metal Pless angle blades made in Quebec. The best made out there, but at $18000.00 dollars a small plate welded to each side of bucket with a receiver tube welded to plate and 5 foot long 2" tubing pushed into it with one securing bolt and conveyor belt bolted to it. That was what my math skills told me would pay back the fastest.
It is the snow that doesn't roll out the sides that saves the most time.
Might not be fancy, did not even paint the arms, but works better than I anticipated. No engineers to pay.
Simon C