Help With Tuscon Horn Assembly
 

I have a 2005 tuscon and recently the horn stopped working.
Took it to my dealer, who replaced the clockspring, and that did not fix the problem.
He said that they think there's an electrical problem, and that to repair it would be really expensive. what he recommended was purchasing an after-market horn kit and he'd install it for me.
Trouble is, I don't know where to find one that fits or is appropriate, and searching online is just confusing me more. the local auto parts stores were no help, and seemed to know even less than i do.

The dealer said it had to have a button, a horn, and way to get power from the fuse box, but could be just mounted under the hood.

Is this the sort of thing I need? http://www.amazon.com/OE-Aftermarket.../dp/B001G7HH6Q

If anyone knows of where I can find this part, please help me out!