HMD do sell a few Nokia-branded phones in the US; most of their international range is available on Amazon US.

https://www.hmd.com/en_us/nokia-225-4g?sku=16QENL11A04

I've had four HMD phones, two feature and two Android smart phones. The hardware usually feels really good, but all of them have had poor phone quality (even on different carriers). People would tell me if sound like I was underwater or far away from the phone while not using speaker), sometimes it would just drop the audio and I couldn't hear the other person, etc.

I guess I still have nostalgia for some of the late Nokia phones, like the n900 and e72.

My current Android HMD has been fine, but still has call issues (people often don't hear me for like 5-8 seconds when I call them; speak from just randomly stops working during calls).

I have had three HMD phones now, all have had very good call quality when used in Europe.

These new Nokia models/re-issues are of very poor quality, see my other comment.

They are not made by Nokia, but by HMD which has very low standards of product quality.

I think what parent meant is that he would be willing to pay good money to anyone who could clone the 5110 to use 4g and keep the same screen.

Yes. I love the simplicity of the screen and ui, and don't want these newer ones. the problem with the older ones is they don't work anymore as 2G or 3G is disabled nowadays for many providers in the EU.