[regularfry]

https://store.planetcom.co.uk/products/gemini-pda-1 - form factor-wise it hits all the right notes, but the chip's a bit underpowered.

In fact, noodling around as a result of this thread has revealed a more recent model from the same people: https://www.techadvisor.com/article/797640/planet-computers-...

That looks interesting enough to take a punt on.