Short Answer: The x3/x30 foldable keyboard works in this respect for me.
Long Answer: I use the foldable keyboard as a stand so I can get better recordings of class lectures (can aim the mic at the teacher a lot better this way.)

Unfortunately, I doubt the availability of the keyboard is widespread seeing how old the x3 & x30 are. As a side note, my keyboard can pretty much only work as a stand (and charger) now...a few months of keeping it smushed in my backpack apparently made five of the keys inoperable.