Good reason to buy yourself a mag drill.  I have cut my own holes in cutterbars with a few carbide cutters.  You could add your own style cutting edge to bucket.  Attached are a few pictures.  I was always going to make a flat cutting edge to bolt onto the teeth on my bucket and it would have a half circle cut into the flat edge for centering pipe or wide in bottom of a wide trench.

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20221206_153552 (full).jpg (125KB - 160 downloads)

20221206_143956 (full).jpg (95KB - 168 downloads)

20221206_140653 (full).jpg (153KB - 151 downloads)

20221205_172321 (full).jpg (121KB - 144 downloads)

20221205_171231 (full).jpg (170KB - 156 downloads)

PXL_20210916_215454188 (full).jpg (141KB - 149 downloads)

20200413_133001 (full).jpg (61KB - 174 downloads)

20200413_132929 (full).jpg (85KB - 151 downloads)

20200413_132846 (full).jpg (66KB - 158 downloads)