I decided to bump this thread one last time. I'm expanding my search a bit to include any Pono Standard baritone size ukulele with a radius fretboard. So I think all of the Pro Classic versions would fit, and there are a few other models as well that came with the radius fretboard.
I'm not interested in the UL4 nor Nui models. I already have 4 of those.
Thanks,
kev