Tomei steering wheel, need a horn button replacement!, (needs to get done to pass safety inspection) Options

[Jeebus]

Heyo,

I just purchased a '94 Celica GT-Four online over the Canada Day weekend, and it was in the province next door. I had my friend (in the same location as the car) over the past month take a look at the car, talk to the seller, and get as much info for me as possible. I decided to bite the bait for the low price of $5k, knowing that there would be a few fixes in need.

One thing I did not know when I arrived to pick-up the car was that the horn didn't work. I actually found this out while I was making my 8hr drive home across the Rockies. The plastic cover that has the Tomei sticker has 2 out of 3 tabs broken, and no spring or metal connection point to the bottom cup, which slides into the steering column.

So here I am, at home now, trying to fix all the necessary items before I take the car into an out-of-province safety inspection, which needs to get passed in order for me to be able to register and insure the car.

PROBLEM: I cannot find a replacement Tomei horn button anywhere.

QUESTION: Can I use any of them generic horn buttons off of eBay? Most say that they fit any major aftermarket steering wheels (Momo, etc...), but do not mention Tomei. They also say that they fit 2-inch holes. I took measurements and pictures of the assembly off my car, but I just want to make sure 100% before I plunge into eBay and buy a generic replacement. I didn't think about measuring the back part of the horn button until today, so I measured it, and it was 2 inches, give or take a few mm, but I would like some reassurance from you folks.

QUESTION #2: Once I receive a replacement, will it simply be hooking it up to the single red wire from my steering column?
(Side note: previous owner did little projects on the car, but I'm finding he'd done a poor job, or didn't really take care of his car).

[The_enD]

What's under the tape? Looks very similar to mine.
If I am not mistaken the horn should work if you touch the wire to the metal, as mentioned above, it is the ground.