Is there anyone you could connect them too in getting work or spawning a new business relationship? Have these clients not just been great clients, but also great collaborators? Could their misfortunate be an opportunity for them and you to get different kind of projects going, then you otherwise would have? Do the entrepreneur thing? I know that is a risky option- but just thinking. . .
I like the idea of you recommending them on linkedin. As well you will most likely then get one back.