B1811 Code, how can I confirm it's the clock spring/spiral cable?

Hey everyone, this is my first post to this forum. I have a 2009 6cylinder Tacoma and I need to get my inspection sticker. Problem is that my airbag light is on. I threw a scanner on it and got back a B1811 code. Most of what I've read online seems to indicate it's my clock spring however, my horn works fine. I haven't tested my cruise control yet. I have also read that a B1811 can be tripped by an instrumental panel wire, faulty steering pad, or a faulty center airbag sensor assembly. How can I make sure it is indeed the clock spring and not one of these other components?
Second question: If I determine it is the clock spring that needs replacing, am I better off buying a cheaper replacement, spending the money on a more "decent" replacement, or going to a junkyard and ripping one out and hoping it works? I have seen some clock springs for as low as 20-30 bucks and as high as a couple hundred. If it probably won't matter very much, I'd obviously rather stay on the cheaper side, but if I'll have to replace it in a couple months, I'd rather just put the money into something decent and not have to worry about it again.

Thank you all for your input. I'm pretty much a newbie for taking care of my truck (most I have done in the past are headlight replacements and oil changes haha). I can no longer stomach going to the mechanic and dropping $500+ a whack. Therefore, I'm trying to learn how to fix issues one piece at a time (and it didn't cost me a dime). Thanks again!

 

My horn worked intermittently for quite awhile before it finally stopped working altogether.
The clock spring is a relatively easy job to do. I was nervous before doing it, but the write ups here make it easy.

 

It may take expensive diagnostic tools to pinpoint the cause and rule out the instrument panel. It does sound like a clockspring to me. I’ve had the airbag light come on in both my Taco and daughter’s 07 Corolla. It was the clockspring in both cases. I’ve been buying the cheap ones, two at a time for about $30. They last a couple years; I’m on my fourth.

 

Question:

Do you actually need to fix this to pass inspection?
Your truck is old

I live in NC - here if the vehicle is over X years old it is allowed to throw 1 or 2 codes and still pass inspection
I had an old E36 that threw an O2 sensor code - but since it was older than X, it still passed inspection [the cats were bad but whatever]

I need to replace my clockspring - horn works intermittently
I just haven't done it yet and I keep waffling between OEM part and aftermarket part