I'm not sure how I missed this one.
I've owned The Complete Book of Scriptwriting
for months now, but since I only use it as reference, I hadn't read the chapter on writing for animation. Which means that I missed J. Michael Straczynski's inclusion of his premise for and partial script of "Midnight on the Lady M.", an unproduced RGB script.
Straczynski was head writer on the show for a number of seasons, notably the first season.
Besides the RGB bonus material, the book is possibly THE resource for anybody wanting to learn how to write for television and film (and radio, etc.).
Thanks to Ryan Leclair for being a more meticulous reader than me.