LOL, interesting request and think you're gonna have to do some investigative work if you want an answer, because even if anybody here had those cookies in the time frame, they're not gonna know the recipe.
If you're really driven to find out the recipe, I can make suggestions about what I think I'd try given the situation as 'known'.
LA unified school district as you know is huge, so I'd try to find head office and ask for the school meals section.
If you find somebody cooperative, that would be nice, and I think maybe very lucky!
If not, I think I might say that I was a journalist for (?) magazine, doing an article on school meals in the 90s as compared to today and that you'd like to feature some of the bygone recipes like for chocolate chip cookies.
Just a thought, hope you'll let us know what you wind up doing.