How about cannibalising a Phillips Planisphere - I have an old large one lying around unused, 20 cm diameter map, white stars on dark blue ? You can have it if you like.
My own favorite these days is an iPad app - the Emerald Chronometer "Observatory" clock which shows siderial time, local time, solar time, the zodiac, altitudes of sun, moon and planets and has a nice soft "bong" for the alarm reminiscent of a decent pendulum clock.
The other is the the Emerald Chronometer app which is a mind-bogglingly complex astronomical "watch" for the iPhone.
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