I have a weakness for self-setting clocks. Designed and built two - both of them WWV - back in the 90's when the cheapest pre-built commercial unit I found cost about US$100. Today one can find pre-built "atomic" clocks for under US$20. I saw one such clock at WalMart this summer and grabbed it. It's a Sharp SPC315. Sets itself just fine here in New York State, which is a good thing because its oscillator isn't accurate. Looks more like a desk clock than an alarm clock, but it does have two independant alarms. The LCD display shows Hr & Min with 1" high characters, day-of-week, month number and day of month number, phase of moon, indoor and outdoor temperatures (not very accurate), and alarm time.
As is usual with most things I buy I disassembled it for a look under the hood. Surprise! Every other "atomic" alarm clock I've seen has its receiver hard-built-in, either attached to the ferrite stick of the antenna or most components mounted on the main board. This Sharp has an easily separable receiver, a small glass PCB with wire antenna that is attached to the main board via a 4-pin, 0.1" header. Soldered to the header though, not plugged, but can be easily removed with a solder-sucker.
Want to design your own WWVB "atomic" clock?... maybe with 3" high LED digits? Get the $20 Sharp clock and cannibalize it for the receiver.
DO NOT get the smaller and cheaper Sharp SPC364 clock. It's receiver is different, integrated with the main board, and is not so easily removable.