If you get an answer on sizing can you let us know? I'd need a 48-49 which may not happen from Ali

Like that?
https://www.aliexpress.com/item/1005007723985870.html
10 bucks + shipping. Not sure about the sizing, though.

If you just want arch support but don't care about the adjustability, there are some options with fixed arch bumps, cheap as dirt.

Not sure what CSC is. Farsports, Xiamen carbon speed (Peter on the forum), Yuanan, Elite all have good reputation. Yuanan is the OEM for elite.
They can all do brass nipples if you ask (not elite because it's a sausage factory there and most of their rims are narrow by latest standards anyway).
Definitely ask for T800. Peter started using T1000. T700 is heavier, less stiff, and cheaper. Rotating mass doesnt matter at speed, but it matters when you accelerate, and snappy wheels feel nicer. It's a small price hike well worth it. We're all talking OEM pricing so over 2-3y (if not more) it's really not much. And resale value will be higher too.
Light bicycle also has great reputation (usually a bit more expensive) https://www.lightbicycle.com/. Lots of boutique shops in the west use these rims.
 
Honestly look for the spec you want and order from any of these. It's commoditized. Choose your spec, then based on who's treating you well & price, order.

Those are a pretty niche product, and typically niche products don't end up having an Ali copy. If they do, they're usually pretty bad.