Suggestion for making one:
Take a tri-corner file and anneal the end. Grind back until just slightly larger than the triangle formed by the three holes. Make three .100" deep cuts to isolate the tips, using a jewelers saw or a thin cut-off disc. Remove the metal in the center with a small ball burr or similar tool. Round up the tips, checking for fit. Re-harden, temper at 500F, and stick in a dowel as a handle. It probably took longer to type this than it would to do it.( except for the temper)