Nice piece - congratulations
Just trawling though some books and Lengola does seem to be closest in blade form. The blade shape, narrowing at the base and central raised spine is very close. Less sure about the hilt because the only good example I found so far has a carved figural hilt. Overall size fits too. But this is just one example I found in Panga na visu.
I hope someone who knows more will chime in.