Mirror extenders

I'd like to get a set of mirror extenders for my Terra.

Has anybody tried the generic ones on Amazon?

These are $12.99 shipped
https://www.amazon.com/Astra-Depot-Motorcycle-Mirror-Extender/dp/B019IDMAAC/

Whereas the Touratech ones are $94.50 + shipping
http://www.touratech-usa.com/Store/3474/PN-040-0649/Mirror-Extension-Kit-Universal-M10-x1-25-PAIR

The top pair says 10mm, and Touratech says M10x1.25.

Any other more reasonable alternatives that the Touratech ones?

For the same price of the Touratechs you can buy a full set of long-arm Doubletake mirrors.

I'm perfectly happy with the OEM mirrors, I just wish that I didn't see my shoulders through half of the mirror. If I could fix that with a $12 part, I'd be happy. I just don't know if the thread/pitch on those from Amazon will accept our mirror.

$12 bucks! Just do it!

Touratechs.....$94.50 wot?... they must be made of gold

This is some interesting option:

https://www.doubletakemirror.com/

They are fantastic mirrors. I had them on my plated KTM 300 XCW. Went though hell and back and never broke.

It I had more of an endure bike, I'd be interested in the doubletake mirrors. I don't want blurry mirrors on the highway though.