Can confirm that Miyavix Overlay Plus screen protector for Gemini PDA, available on Amazon US (and perhaps elsewhere), fits perfectly.
Almost too perfectly--it's difficult to install. Only Japanese instructions, but I installed right to left, with Scotch tape at hand to pick up dust, etc as I went along. At one point, had to pull it off and clean the whole thing with Scotch tape.
Protector appears to be anti-glare, so it's not glossy like the Gemini shipping protector. But it's responsive and is cut correctly.
Jake