I went to about 5 local shops yesterday. In the last shop, I found a right side JTEK shifter that had been laying around for years. It's indexed for Alfine 8 speed. I got it for a good price.
I checked and it fits on the end of Nitto bars.
PROS: The switching is VERY hard and deliberate.
CONS: I won't be able to fine-tune it like a friction shifter.