If you check on Joel Sartore's website-(National Geographic photographer) He has a picture posted for the photo ark of a Banded Linsang photographed at Taman safari
(But I don't know when that was taken)
Joel Satore's photos are never dated, which is annoying, however I just found a video of the Taman Safari linsang (by Joel Satore) uploaded to Vimeo in 2018.
I have never heard of a linsang being at the Singapore Night Safari within the time-frame given earlier though.