Atari 800 Disk Drive

My wife has mentioned for years the fun she had playing Jawbreaker on her Atari 800 growing up.  As a surpise to her I found a copy of Jawbreaker on ebay and picked it up.  I could have sworn I had an 800 drive in my extra computer items stored in the basement but for the life of me now I can't find it.

Does anyone have any idea on where I could buy a working drive for my Atari 800?  I really want to surprise her for Christmas!

Bill