I have a Mirrycle bar end mirror on my drop bars and wouldn't trade it for anything. Clarity is 2nd to none. To answer the question of it vibrating, I have never had that problem - though a true road bike with high pressure skinny tires may be different
It appears that Mirrycle still makes the Shimano STI mount mirrors if that is what you're looking for.
https://www.mirrycle.com/product/mirrycle-road-mirror/
