My recommendation is to stiffen the the bucket up so it won't bend again. You can buy a 6" x 1/2" beveled barstock piece and weld it under the buckets cutting edge. (the bevel will extend the edge out slightly). That will make your cutting edge thicker and more stout. First, bend it back as close as you can get it. Then clamp and tack it in place. Then you can weld it up solid on top and stitched from the bottom overlap. You may want to stiffen up the top and bucket sides now too.
There is probably a local source for barstock in your area. I'll attach a link (I read about on here) that is in my area. I need to do the same to mine before I bend it.
Good luck and hope this helps..
Discount Steel - Hot Roll Beveled Cutting Edge