> How likely do you think it would be for someone to machine the right > kind of blanks out of stock? Or possibly existing key blanks that > just need a few extra cuts on the sides?
It's really not going to be necessary to machine blanks. Download "Key Blank Directory - Edition: 13" from here: https://www.ilco.us/support/resources and explore e.g. Yale keyways. The lock may not have been built by Yale, but that approximate keyway shape is widely used. De