I made several buckets for my BH. Some plate steel, cutting bar, 3/4" stock for the pivot point brackets, a sledgehammer and an old stump. (These last two are v-e-r-y helpful for putting that gentle little curve in the bottom of the pan.) I used what I had and could scrounge up.
The smallest was a 12" which I found great for laying pipes and cables. It was reinforced and sharpened on all edges for cutting through roots. I got the teeth from a local Bobcat dealer and pinned them onto my home-made tooth mounts.
I also made a 16" for normal dirt digging and a 24" for culvert installations. The wider, the shallower to prevent strain on the little hoe.
As I recall, the dealer wanted several hundred $$$ each but I had less than fifty bucks in them all. /forums/images/graemlins/grin.gif
Go for it!