I really didn't expect this, because of how short the previous transmissions have been, but here it is almost 11 PM and they are still on the air. I haven't been listening the whole time as wfter they finished with 1956, and started 1965, I had to run out and didn't turn it back on until just now. Instead of robots, they are running the American top 40 year end countdown from 1971. If I had the free time, I'd drive around and see if I could find it (I'm prety good at it, lots of experience tracking down CBer's back in the day).
I'm not going to post further on this as it strays away from the original post of an FM station list, but it seems like this one might be sticking around for a bit, you could add it to that list. (Maybe)