I have an extra dash cluster at home that I can look at tonight and let you know if no one answers your question before that.
The only difficulty in replacing the bulb would be removing the instrument cluster. If you're like me, you've already removed the dash bezel, and other dash pieces, more times than you can count so it shouldn't be too tough to do.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless