Just search online, you will find many site sell round rimless glasses for men. Besides, they are also sold at a very low prices. You can easy to make comparison at online and choose the best suitable one. As far as i know, firmoo. framesdirect are good shop tp get cheap round rimless eyeglasses. But framesdirect provide some brands eyeglasses frames at affordable prices while firmoo offer really cheap and good quality products.
Round rimless glasses are considered as the classic glasses and they become popular in recent years. These round rimless glasses are also called steve jobs glasses. They are preferred by many men. They are lightweight and comfortable to wear. You can find them in the vintage store in your local place. If you want to get them online, you can just search them in the web broswer like google. Try ebay.com and you can get what you want.