A shave horse and a nice hickory limb would work nicely. Cut it to the length you want when it fits the hoe right.
BTW I have a similar hoe I purchased a few years ago. I love that thing for certain jobs. Here is the one I have. They also sell various handles. They may have something that will fit your needs.
FB55F – 5.5″ Flat Bottom hoe | Prohoe
BTW I have a similar hoe I purchased a few years ago. I love that thing for certain jobs. Here is the one I have. They also sell various handles. They may have something that will fit your needs.
FB55F – 5.5″ Flat Bottom hoe | Prohoe