Replied by Ted (Bangkok, Thailand) on 03/09/2008
Actually most drug stores can order the borax from their suppliers. The popular chemical suppliers most foreigners order comes from Vittayasom here in Bangkok. Perhaps you can contact the telephone directory in Bangkok and talk with Vittayasom, or ask the drug store to contact for you. Borax they sold is about 500 gram, or 1/2 kilogram to general consumers. Also in Thailand we have a school supply store called Suksaphanpanich that also sells borax too. If the drug store will not contact them for you just ask the representative of Vittayasom, since they seem to have a large distribution channels and are easily acquired here. Ted
