I'm sure the dark pegs aren't original. The light one might be, but I doubt that either.
My own Kumalae has much lighter pegs, and the buttons look to be hand carved, not turned. Crude in comparison. I did research when i got it, and the descriptions i found of the original pegs matched mine.
What I think your friend has are violin pegs - the pearl dot is commonplace. I'd simply buy a set of 1/8 pegs (maybe 1/4, but I think 1/8 is more likely) and keep the old ones in case they are original - who knows what Kumulae used over the years?
Dark pegs with pearl dots should be easy to find.