Seems I remember the bulbs are "wheat bulbs" which are a tiny solder-in only type bulb. You'll need a few wheat bulbs, which can be had from http://www.mouser.com/ cheap. You'll need someone with a pencil iron and skills to replace the bulbs.
Here's a few links to ''wheat bulbs"
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXYP16
http://www.hobbylinc.com/htm/mdp/mdp383.htm
http://www.scientificsonline.com/cle...eat-bulbs.html
($40 for a pack on 100)