unless some shop has inventory they bought from cte 2+ years ago (insanely unlikely), you’ll have to find a kit used. I don’t care if 100 aftermarket sites have it listed on their site. Call them up, and I’m sure you’ll hear they don’t actually have them.
You can call your insurance and just ask what the cost would be for x year si and they’ll tell you in a couple minutes. Age, credit score, state/city you live in, driving record will make everyone’s rates way different.