From my experience, OEM replacements are pretty sucky to varying degrees.
Late to the party.. I got a double take adventure mirror.
Uses (somewhat bulky) ram mount system but very easy to adjust and folds away easily.
My fe450 is doing double duty enduro/sumo so I like it to have this durable mirror.
https://www.doubletakemirror.com/
These aren't bad - I've used a few sets of those. As with any RAM, the clamp eventually "deforms" the roundness of the ball, then slips. The more you tighten, the more it deforms, the more it slips, etc..
I find the key is every couple of weeks, loosen the clamp, remove the mirror (or whatever accessory is attached) leave for a day or so, then reattach one the ball regains its shape.
I find the DT mirrors a bit heavy and overkill for a lighter bike, especially one mostly doing offroad duty. For that reason, I've now used the HDB system - handguards with integrated mirrors. Granted, it's primarily a handguard solution - which cures all of the shifting/deforming/slipping issues I've had with systems like Acerbis and Cycra. But I like the optional mirrors - they tuck out of the way nicely. Their build quality is superb, and the couple of issues (one stripped bolt, one missing spacer) I've had, they did rush overnight delivery of the missing/replacement part. Best customer service attention in the business, in that respect.
https://www.highwaydirtbikes.com/index.php?app=ecom&ns=catshow&ref=HDB-100
Extended:
Stowed:
Horses for courses, lots of options for different likes/dislikes - just another to consider.
cm