Ok, I'm gonna try one last time. Honestly, I'm not sure why this is so complicated. All I want to know is the URL of a place where I can buy these plugs for $18. Someone posted a pic with no URL or store name. You've replied twice, also without mentioning a URL or store name. What is this mysterious site where I can enter some promo code at checkout?? It's not Amazon, it's not anker.com, it's not eufylife.com (which just has a link to Amazon), so what is it?