Great, so you've checked the bulb out and you've found it to be bad. Now at least we've found the source of your problem. The bulb is all that you need. You can look at the bottom of your dimmer switch and see how the bulb was completing the circuitry.
That blue cover is called a condom incidently. yeah i know, funny choice for a name.
You can contact
http://www.courtesyparts.com and buy the bulb from them. Previously people used to replace entire dimmer switches just because they didn't know about this little bulb. I tried radio shack already, they have a similar bulb, but it's not the same. Call up courtesyparts instead of mailing them, you'll get what you need instantly with a phone call. Mails take like 2 days for then to respond to generally, in my experience.
You CAN drive with your dash taken apart, just make sure the hazard lights switch is plugged in or you won't have turn signals. I would suggest you put it back together but leave the screws out, only take less than a minute to put it back into place.
Good luck!