Your monitor supports VESA MOUNTING 100x100.
VESA is the standard that the arm and the monitor supports and specifies the width of the "plate" with the holes.
Any monitor arm with this specification will work.
If you get an arm with a different dimension (not 100x100) you may get an adaptor.
E.g. the following specifies at the description supports 75x75 and 100x100, so it is good for you monitor without adapter.
They are a brand called mount-it! And are widely available at best buy, frys, and Amazon. Mount-It! Single Monitor Arm Desk Mount | Gas Spring Monitor Arm | Full Motion Articulating Height Adjustable | Fits 21 22 23 24 27 30 32 Inch VESA Compatible Computer Screen | Clamp and Grommet Base https://www.amazon.com/dp/B01F2SAU3G/ref=cm_sw_r_li_apa_i_oJI2Eb9PY4H09
Curved screens are tough. I used this for m 34" curved HP.. https://www.amazon.ca/gp/product/B01F2SAU3G/ref=oh_aui_detailpage_o06_s01?ie=UTF8&psc=1
It works well but my desk is caving in from the weight, keep in mind you will require a solid base.
You could try something like this. They say ‘up to 32” ‘ but overall size doesn’t matter it’s the weight. You will need to make sure your monitors are not too heavy to be held up by the arm. I have two of these for my 32” monitors. I don’t have mine stacked though. You will just need to see if one arm will reach high enough to be your top mount. I’m betting it would be though. Having your monitors off your desk is amazing trust me. It’s Amazon they will always take it back if this doesn’t work.
Side note: if you do go this route the adjustment for how much weight the arm holds is on the “elbow” of the arm. There is a screw you turn OUT to make it support more weight. Seems counterintuitive and I’ve seen people miss that
Mount-It! Monitor Desk Mount, Computer Monitor Stand, Height Adjustable Arm Fits Up To 32 Inch Screens, VESA 75x75 and 100x100, 20 Lb Capacity, Black https://www.amazon.com/dp/B01F2SAU3G/ref=cm_sw_r_cp_apip_lRAUfEF359cq2
For the left monitor it’s: Mount-It! Monitor Desk Mount,... https://www.amazon.com/dp/B01F2SAU3G?ref=ppx_pop_mob_ap_share
For the right it’s: Ergotron HX Ultrawide Monitor Arm Desk Mount - for Screens 20 to 42 lbs - Polished Aluminum https://www.amazon.com/dp/B01MXYN33U/ref=cm_sw_r_cp_api_glt_fabc_13BCBHMBYGTYV97KC5PY?_encoding=UTF8&psc=1
I use different ones because they both weight differently. The right is heavier than the left.
PG348Q (left) and PG35VQ (right)
Thanks! Mount-It! Single Monitor Arm Desk Mount https://www.amazon.com/dp/B01F2SAU3G
They are "Mount It!" monitor mounts:
https://www.amazon.com/gp/product/B01F2SAU3G/ref=oh_aui_detailpage_o05_s01?ie=UTF8&psc=1