So I just went through an episode where my solitary OEM FOB finally succumbed to entropy and basically disintegrated thus not allowing me to start the car. Making things worse was the fact that I set the alarm that morning before the FOB totally fell apart and was no longer able to turn it off and thus the alarm blaring when I tried opening the door or try to crank the engine.
Calling the local GMC/Buick dealer only led to more disappointment as I was told that the part is discontinued and that my situation is an absurd one and that I should "throw the car away". Madness.
Anyway, after scouring teh interwebz I found one dude in NY that bought a bulk pack of the OEM FOBs direct from Ausland and it programmed just like the instructions on this forum said. Because the alarm was on, I got that bizarre message on the cluster talking about "alarm overide by hotwire". I did transplant my original key into the new scaffolding so didn't have to worry about the key-cutting and the car started like normal. The link below is the guy whom I bought it from and it DOES come with a blank OEM key ready for cutting.
Hopefully this helps.
Link:
Up for sale is a complete OEM key fob setup for the 2004-2006 GTO. This includes the OEM Holden Monaro remote (Pontiac ones are no longer available), oem key blank and 2 screws. The Pontiac and Monaro key fobs are identical except for the logo on the back.
www.ebay.com