you can go to the shopping plaza that is beside the rows of restaurants, along the bukit timah road.
If you dont know what im meaning, keep driving along the road outside hwa Chong JC, pass through the coffeeshop, till you see rows of restaurants, turn to your right you should be able to find that plaza.
If im not wrong, at the ground level got a store that sells and makes uniform, my bro bought his NJC pants there maybe you could try your luck there
