We found this Google map which details the location of saga trees found in Singapore and have just gotten in touch with its creator.
3271 Seeds From a Saga Tree
Met Mr. Low See Chuan who created a map of all the sage trees in Singapore since he started collecting the seeds with his family 10 years ago. Every time they add new seeds to their collection they do a tally on a slip of paper. At last count the total was 3271!