Here's a site I've been using that guarantees authentic circle lens:
www.i-beautyshop.netPROOF: I-Beautyshop Package (Changed their name to Trends & Beauty).
Package with lens & instructions.
The type of lens I received: X-CK105 Geo Magic Lens ($22 shipped)
(Free shipping to customers within the United States)
Other lens I own and bought from i-beautyshop.net
I recommend this site because they have fast delivery and great service. Their prices are fairly decent and the owner is easy to contact with (:
(P.S. Don't mind the screenshot on my computer -_- I was on tumblr)