Does anyone know of a Canadian online vendor that sells food grade or otherwise suitable Sodium Hydroxide?

check out home hardware. not all stores carry it but its called home brand lye crystals, 25 bucks for probably a lifetime supply. cheers
http://www.homehardware....l_EN/R-I3226431?Ntt=lye
also your going to need some of this naphtha: Escort brand from crappy tire. for the love of spice dont get coleman!!

Are these sources clean? ie. no heavy metals or impurities other than water?