Hi Hans,
In the north-east part of Borneo you mostly see the moro styled krisses. This because the moro's also settled at the coast there. But the natives there who had these, got it by trade or buy (or from victim?
)
In the south, in the Banjarmasin area, the types crossed you find on attached 2 photo's from the Leiden Museum (but here a lot of trade was going on).
All other kinds of kerisses found on Borneo (old ones) are imported by traders and travellers. You find Javanese, Buginese, Sumatran and other types in museum databases depicted as Borneo kerisses.
But they are no typical Borneo kerisses, because the nativs of Borneo traditional never had kerisses.
Old kerisses could be acquired in Borneo, but that is all! They were once long ago imported!
Rg,
Maurice