I got mine from Abbeon Cal--$939 each.  Expensive, but worth it:  they
change from weekly to daily, easily accessible, easily readable, energy
efficient (the initial non-alkaline batteries lasted 2 years!).  Kind of
hard to clean, though, and they are extremely delicate and get out of whack
easily.  Documentation is not very detailed either (they are German-made, by
Lufft, and they apparently made the decision to keep the English
documentation to diagrams only and very little text).  Best for storage
areas, with something more durable for very public areas.  Call (805)
966-0810 for a catalogue.

Julia Moore
Indianapolis Art Center