So, I complained to a friend of mine about the N800 not having a hard cover like the N770... and not having the sock which zips shut... and she just told me: why don't you put the new sunglass cover into the sock from the old 770?

And so I did, and now my N800 is safe from falling out and down on the floor!

Yes, this may very well be what McGyver would've done!