First off,

to TFS! I hope you enjoy yourself here.
As for a replacement dash, I'd start off looking on eBay and craigslist, then I'd go to one of the site that handles used/new parts like Hawks Third Gen, Youngs Motorsports (formerly F-Body Motorsports), T/A Creations, etc. I'd also look in your local newspapers for anyone parting out a 97-02 Firebird, since all of those years use the same dash.
But can you do me a favor please, can you go to the New Members forum and make a post telling us a little about yourself and your car. Once you've done that can you go into your profile and fill in your Tech Tool Tray with the information about your car. We ask members to do that so in the future if they post any questions about their car we have all the info about that we need and we done have to ask the same questions over and over (auto vs manual, any mods, etc. ) Thanks!