The only thing that comes to my mind right away is use the SRD adventure prompt tables a bunch of times, then maybe combine / tweak some of the results that feel best suited to your game’s setting and use them to make a new table? I realise that might be a bit too much extra work 😅
Adapting the SRD tables to have longer options instead of just adjectives, verbs etc? That way perhaps you could streamline it and have it be more specific to your setting?