"Maria's" half-brother "Jack" died in Hirakawa Zoo, Japan in 2007. He never bred.
Sorry, I don't think it is online.
So far as I know they're still in a breeding situation, Emma and Subis tend to have young around a similar time every 2-3 years or so.
Reading back through this thread and noticed this, it's more like 4 years and even this is a much shorter inter-birth interval than in the wild which is about 7 or 8 years.