I suppose it depends on whether you will be mounting the arm to the wall, or attaching to a desk. There are some on Amazon with great reviews. One thing to consider when purchasing a vesa arm: Is the size, and weight of the monitor.
The size of the monitor is 27", and the weight is 4.7kg (10.3617lbs)
So any mount with good reviews; that supports 100x100 vesa, and that can hold a 27" monitor weighing 4.7kg. Extra features like a cable tidy would also be beneficial.
These links are for Amazon Canada:
This is an example of an arm attached to desk
This is an example an arm mounted to the wall
I’ve actually ordered the Spectrum with the official Eve stand, because it looks of very good quality, and I will move my Spectrum around.
Edit: Sorry I seem to have completely missed that you wanted one that attaches to the desk. The link to the arm that attaches to desk, seems to have good reviews, but the stand is heavy so would depend on your desk whether it’s suitable, or not.