Where can I get a setup disc for an AppleCD 600e?

Last November I posted a question about obtaiing a driver for the AppleCD 600e for my PB2400c I later found that the driver was listed in the System Profile, and what I really need is the original setup disc, which I either mislaid--I bought the CD drive several years ago--or never had.

Thank you again to all of you who replied to my original post,

Joyce W.