Do you have your car yet? I think you’d be hard pressed to actually use the two little triangles of glass for outward visibility. For me they may as well not exist at all, the head rotation is need to use them is not realistic.
Matching them would be an issue, i suspect they’re closer to 10-15% tint for aftermarket match and that’s just too dark for me to go to.
As for cost and labor I rightly remember someone here getting them replaced but the amount was well over $2K, the labor involved isn’t pretty. You have to remove the brake light, trunk trim pieces, rear bumper, hatch trim pieces, both entire rear fenders, fender cover pieces, interior trim pieces, and then you can remove the glass from the inside.