Howdy all, it's new alternator time after 169K. Looking at remanufactured Denso across the web from rock auto and toyota parts sites, but it seems like densoproducts is selling them cheap (138+shipping) and not charging a core fee so I can keep the fixed up old one as a spare. Any red flags with them? Chance of knockoff? Seems like the site is a subsidiary of SparkPlugs.com/Monarch Products.