You mention gauge cluster, which I'm thinking speedometer, and then you mention gauge pack. The speedometer is not an accessory, but the gauge pack is. If you go to
www.gmaccessorieszone.com you can pick from any of those accessories listed there.
If you're upside down in a car with a bunch of nightmares, it doesn't sound like a bad deal at all. Just realize you're trade-in for the Camaro isn't going to be too good later on down the road, due to paying a higher price for it.