I stumbled across this very cool collection of monologues delivered by women that include the script (I don’t know if they have videos. You would want to check before selecting one). Some of them are monologues within conversations and some are just short remarks so be sure they will meet the time limit before evaluating them for a strong theme.
But these might give you some less common options. It’s also nice because the great movie monologues tend to mostly be delivered by men. Women’s monologues are often kind of lame – like the Mean Girls Prom speech. Some of these are really powerful. But, again, there’s no guarantee that any of them are a “perfect” fit. Use the criteria from the assignment rubric and make your best selection.