Ok. I found this thread/forum after extensively searching for Westwood One's Adult Contemporary music feed.
What happened is a local AM Radio Station finally shut down. They mentioned the problem with AM in this new world, yada yada... Unfortunately,
they played the best music ever and are now extremely hard to replace. To be fair, they do admit that they may come back with proper demand/support. This is one of the reasons I registered to reply here on this forum. The station was AM 1220 KLBB "The Club" out of Stillwater Minnesota - You can still see traces of it by searching now. Go ahead and fill out the "I'm interested e-form". They were on the internet all over the world. Everything you were reading above and expecting from an adult contemporary station was there, stemming from Westwood One, but they had a proprietary element to it as well which kept it from too much modern light rock. Karen Carpenter, Gloria Estefan, David Gates, Johnny Mathis and plenty of even older hit makers. Unreal. I miss them terribly and the world will be a better place with them back in business....
Other than that, so far, the only station I can even remotely compare is WUCF 89.9 HD2. They are out of Central Florida. I cannot guarantee any Westwood One feed, but what they play is almost a carbon copy with just a bit more modern hits added too. They are also on the internet and can reach the world that way.
Give me some feedback, perhaps I'll give my 2 cents on the stations listed replies above.