Suntec and Vivo Uniqlo has it. Bove at Suntec have some great maternity pants. They are really comfy too. You can head down to try :)
Somerset! :) you can also go to h&m at somerset. Theres sale nw and the maternity pants/ jeans/ tights are on sale $12.
Can try Bove at Suntec City or Zara elastic waistband trousers
East side can try Jewel or Changi City Point!
I got mine from Somerset 313. :)
Suntec city