CMBN AI scenario

[A Canadian Cat]

I have nothing off the top of my head but I have something that might help you find what you want:
http://www.combatmission.lesliesoftware....index.html

You can sort by any one column and filter the list with search terms. For example I sorted by length and entered "attach infantry" as the search terms - no quotes. There are a handful of scenarios that look promising. The search yields 34 scenarios, 9 of which are longer than you wanted but none shorter. Read a few descriptions because there are some that are H2H only but I predict that you can find a few there that will interest you.