On the bulbs for the seat heat switches those are actually part number 272-1092 from Radio Shack, your pic didnt show the top of the packaging.. I found it on the following post.
http://www.pontiacbonnevilleclub.com/forum/2000-2005-other-than-gxp/topic7188.html

however if you go to this link you ...

I found the bulbs at this site for just 29 cents each. You can get 10 shipped to your door for under $10, thats better than having to go to Radio Shack and these bulbs are the same specs as the RS 272-1092 bulbs..

http://www.replacementlightbulbs.com/lamp7219.html

Wes