I bought a Motorola KZ-450
combo keyboard/trackpad that's got a protective cover that turns into a stand about two years ago on one of those "Deal A Day" sites for $30 or $45. I keep it in one of those generic cloth 10" tablet pouches along with my Note.
My only regret with it? Not buying two
at that price- it's been pretty much perfect for me, and I use it to bang out E-mails when I'm flying.