I use a ballistic nylon cover with clear screen. Plenty available on eBay in the $10 to $20 range if you do a search on XP remote cover. Avoid the silicone cover/case. Dirt creates micro scratches in the silicon “window” which eventually “fogs” enough to obscure the screen.
If you just want to protect the screen and you don't want a case for the whole remote, here's what I do: I bought a no-glare iPad screen protector (the plastic kind, not the glass kind) and I cut a section of the screen protector to fit the Deus remote screen. It sticks to that screen just like it would stick to an iPad.
"iCarez [Anti-Glare] Matte Screen Protector". $7.95.
I did this more to cut down on glare and less for protection.
The only problem with mine is that it's started to peel up at the bottom right corner - but that's OK, I have so much material (because the original protector was for a much larger iPad) that I'll just go cut another one!
- Brian
I use the Nylon/clear plastic window type from eBay. I also added some of those stick-on silicone dots to the buttons so I could push them more easily.
I have spare screen protectors from antiquated iPads we no longer have, I just cut to fit. Doesn't need to be fancy to protect your screen, who cares if it's not exactly straight so long as it covers the majority of the screen.