They aren't on Amazon. You have to go to their to Voxxlife.com . Supposedly, they now have a deal that if you use me as a referral I get a $30 credit and you get 25% off. They have a shipping charge that is outrageous for such a little item, but I like the product so much I'll pay it.
You have me send you the info for your referral and then you use type it in as you order.
Otherwise, if you don't want to go the referral way, it's easy to order on their site on line. They are based in Canada.