Pontiac Bonneville Radio Display

Anybody know where I can get a new back light bulb for my Bonnevilles radio display? I have heard these are the problems, but I can't seem to locate any info on them. Thanks

GM dealers do not carry the bulb.One way to get
one is buy an old cassette unit which usually sells
fairly inexpensive and take the bullb from that, on
ebay all the time

I just ordered one from Corvette Radios. Here;s a link to the page. It's an easy install and they provide all instructions on the site. http://www.corvetteradios.com/Page7.html