Hay, metronidazole suppository talaga ang hirap hanapin locally, sis! Try mo ng major pharmacies like Mercury, Watsons, or Southstar, sometimes available lang sa larger branches or kailangan pre-order, kaya better call ahead para sigurado na may stock sila. One of my mum friends naman nakuha niya sa private clinic mismo ng OB niya, so ask mo rin sa office ng doctor mo if pwede they can source it for you or kung may alternative na suppository na available na safe pa rin while breastfeeding. Pero honestly, ask your OB din if may other options na easier to find kasi alam nila na may breastfeeding ka, para sure na safe pa rin, good luck, momsh!