(*: a real blinkenlights machine, forget LEDs: over 80
incandescent bulbs :) (the downside being the bulbs are difficult to get).)
  
The bulbs are available.  I got a bunch from Mouser Electronics
(
www.mouser.com).  The bulbs are CM345 (Mouser p/n 606-CM345).  They're
$0.98 each, but *much* less if you order in quantity.
--
TTFN - Guy