In terms of a home grown Machete in Sri Lanka there is of course... THE Veecharuval ... seen below as a broad bladed weapon on a black backround and a tip somewhat upturned which could be remodeled with a clipped tip etc...Shown also Falchion capable of being refitted and made to look like the Machete form we are observing in both the Pihao stone freize and the Sendai. I include the sketch of Dutch landing in Eastern Ceylon early in the Portuguese period..and the Machete weapon in the hands of a tribal warrior also very like the Machete style under scrutiny.