I can say that in some cases, the big 'story' parts of Custom Deliveries are in isolated quests. I know that's true for Zhloe and Kurenai, at least, which were the ones I remember actively checking.

A lot of those cutscenes are the types that are low-budget enough to not have 'real' cutscenes like Iscah said, though. I find a bit more success in probing through Gamer Escape to find the transcripts.