Try get from 100 Yen shop, I only can spot one in Bandar Puteri Puchong, shop lot opposite of Giant, roughly RM6 for 50 packs, in green packing bu Flora Kitchen, 1 pack is almost equivalent to 2 packs of BOH. There is a shop beside All IT Ikarno also selling it in around RM6-8 I don't remember the exact amount. I found it cheapest among all green tea I found in hypermarket. Tien Ren taste not bad but expensive.

I never do any research or lab test on the tea content so don't flame me, just sharing.