Hey Beiciwr,
I'm hoping to revive this post.
2 months since your op, and the same issue seems to persist that you ran into... It's very difficult to find info online on good fenders for my new 2021 Diverge E5 Elite.
Much of the info I see indicates that many fenders, even the "Plug and Play" fenders from Specialized, have their issues with setup. Because the bike has 47mm of tire clearance with a 700c wheel and 2.1” with a 650b wheel, I want the widest fender that will properly, and attractively fit, and like you mentioned in your op, I'd also like to use the mounts that Diverge now has on the frame for this purpose.
On a related topic, I also want to add a back rack to mount my older Ortlieb panniers on as well. And I want to be able to take the fenders and rack on and off without having to do more than remove the frame mount screws, if possible.
And while I'm on a roll, spewing my bike wishes..., ideally..., it will look great too, as it's a beautiful bike, and I'd like to respect the sexiness of the ride as much as I can, while I understand there are limits to the sexiness when adding fenders and a rack. Although I've seen some pretty sexy gravel bike packing rigs online. Would love to see anyone's photos of 2021 Diverge with mounted gear any of you might be willing to share along with any mounting advice.
Thanks Beiciwr (or anyone else who has successfully dealt with this hunt...)
GVB