T_C, Here is the picture I promised. The two on the top are the longest. Te top one is 33 inches in length and the one under it is about 31 inches. All of these are from the Philippines and most but not all of these are probably from Luzon. I have removed the scabbards (from the ones that still had them)
so you can see the blades better. I hope that this might help. I have plenty of other shorter bolos but as I said before nothing of the length you are talking about.
Robert