Probably unlikely for Lembang to acquire another mates for sun bear and orangutan if the requirement from BKSDA to report the number of native species and breeding progress apply to Lembang, which is why they probably doesn't bother to have any proper conservation project and instead focus most of their attention towards exotic species.
The exhibit bedding being entirely cement might be awful for the bear especially during the evening heat, not to mention how outdated the exhibit is for "the most modern zoo in Indonesia".