I've had several people ask where I got my mirror. It's made by a gentleman in Ohio who's name is Chuck Harris.

This is from the paperwork that came with my mirror...
Ultra Light Rear View Mirrors For Cyclists
Continuously manufactured since 1970 by Chuck Harris. A Green product.

They are available in 1/4 inch, 1 inch, 1 1/4 inch, and 1 1/2 inch. You can get them for helmets or glasses.

He does make custom mirrors.

To contact Mr. Harris, here is the information

Ultra Light Touring Shop
P.O. BOX 363
Gambier, Ohio 43022
(740) 427-3404