Ooo, a 6286? Fancy! There was a bunch of parts to make one of those on eBay, and the guy told me he ven had the original case. Unfortunatley though, I couldn't afford the stuff after I bough computers locally. Good thing I didn't bid! The 6300 I have was my first machine, too. Been using it since I was 2, and I still am at 15. I even have the original games I used to play on it *pulls out Duke Nukem in Shrapnel City*. Fun times indeed! I think I'll drag it from under my bed now.
Going on topic for a moment, I too have two keyboards for the 6300. Unfortunatley, I have 2 6300s that need them. One is in parts right now, but all I gotta do is put it back together and I'm back to needing it. Besides, my extra(unlike my main AT&T keyboard) is yellowed on top, and on the cord, and is nasty.
Lemme know if you don't find a keyboard, I could use the mobo and drives! (By the way, the floppies in that thing are proprieary. My non-AT&T machines don't recognize them, and my AT&T don't recognize my generic floppy drive)
--Ryan