Here's a picture of the extension I put on my B7500. It was 10 gauge and attached to the existing bucket with a few bolts. It was rigid enough to raise the front of the tractor. Never used it for snow, but it saved a lot of trips when mulching. It sat around here after the B7500 left till another member here stopped in and hauled it away.
The picture shows it in the L3200 bucket just for illustration.