kat mana ek nak cari KNO3( potassium nitrate)??

aku tinggal di Malaysia. jadi mane2 chemist yang tau kat mane boleh beli/ dapat kan KNO3(potassium nitrate) , NaNO3(sodium nitrate) atau ammonium nitrate ataupun baja berasaskan garam nitrate. aku tau , dalam ubat gigi sensodyne ade 5gram KNO3 per 100gram ubat gigi. tapi tu tak pure. jadi, ade cadangan??

KNO3 in MALAYSIA

Need help from nearby chemist (I live in Negeri Sembilan) in order to hunt for KNO3, NaNO3 or ammonium nitrate or even a nitrate based fertiliser. This can help our Malaysians chemist to get some oxidiser.