Mark, I understand there's a SiteOne on Walden, in Cheektowaga. Tractor supply may be an option too, one in Alden, one in Hamburg. I've also never seen a pre-em on the shelf nearby, but I haven't tried the places listed above. I think many of these product are 'for prefesional use only' due to New York laws. I have a real good garden center near me, (NorthRidge Nurseries in West Seneca) I was planning on giving them a call to talk it out. you may want to do the same.