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Yes, they are............I am attaching a link for you. http://www.3dlens.com/shop/wide-angle-rear-window-lens.php
They sell these on Amazon and E-Bay as well. Hope that helps here. Please get back to me if you need more later as all follow ups are included in our fee. No time limit.
If you want to do a phone support call.........I am in California and it needs to be after 8:30 a.m. Pacific time.