Rice, you can forget floppies, they aren't even making them anymore. You can use one USB thumb drive and have 100 times more stuff, all neatly organized, than you can with a stack of floppies.
We'll have to drag you, kicking and screaming, into the new century.
This module, controlled by a really small keyboard controller, would be ideal for you.
I even have a two-octave Alesis controller sitting on the shelf, and it's available REALLY CHEAP.
DonM