Ahhh flange insert, yang untuk adjust size breastpump tu kan, honestly susah nak jumpa locally, most of us end up beli online dari Shopee or Lazada la, faster lagi! Try search untuk brand pumps yang common like Spectra or Medela, usually ada seller yang jual the insert separately. Best ask the pump brand customer service directly sana, they might know which shops around Kajang/Bangi stock it, or boleh order direct from them, a few of my mum friends did that and arrived dalam seminggu je.