Cheap Serial 24×8 LCD
September 3, 2010
[WanaGo] on the arduino forum mentioned this. He’s found some nice cheap 24×8 serial LCDs that are perfect for using with the arduino when you’re running out of space on a 20×4 display.
Currently (03/09/2010) they are available for $15 from an ebay seller. He has a few in stock now but I understand that he will be continuing to sell them for a while yet.

Available here
When that link dies, you can see if this seller has any more on his store
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