Did I Get The Shaft???

Okay, so I bought a 95 Lumina LS about 5 months ago for $3200, which wasn't that bad since it had pretty low miles on it and was in good shape.

The other day, I am looking at the steering wheel and I see a little tear right where the leather folds to let the airbag out. It's about 2 inches long, but somehow I never noticed it before. Anyways, it's torn a little more lately and now I can peel it back and see what I believe is where the airbag should be. I can see a yellow piece of plastic that has a few holes in it in a cross pattern. Is that what inflates the bag?

Did I get sold a car without bags that I could have died in?

Do I have anyway to sue the guys that sold me the car, or has it been too long?

I looked over the paperwork and there is nothing mentioning the problem, and I know the guys didn't say anything about it. Is it legal to sell a car without bags in Idaho? I know it is in Washington.

By the way, I'm not exactly too trusting of these guys. They sold me the car with a totally empty tank (below 2nd red bar), and screwed me on my trade-in by about $400.

Any help greatly appreciated.

---UPDATED---
Got some pics this morning from my phone. No pics available for the passenger's side. Please excuse the crap quality.
http://www.geocities.com/KonaKenny7/lumina1.jpghttp://www.geocities.com/KonaKenny7/lumina2.jpg

I'd go check with a reputable body shop, ask them if there's an airbag in there or not. If not, then check your local laws to find out if selling the vehicle without them is legal. If it's legal, you're out of luck. If it's not you have a couple of options. You could either report them, or threaten to report them if they don't intall an airbag for you.