I don't know where to find tinted replacement glass specifically for your car, but have you considered looking for auto glass stores in your area? They can cut custom-tinted glass for your car, a more permanent solution than a film kit. Another option might be to look for recycled Prius V's with tinted rear windows and find out if you can purchase the glass from a recycling warehouse. This can be a little more hassle, but it's an excellent way to ensure the tinted glass is perfect for your car. Yet, as I don't like dealing with tinting, I opted for a
sun shade car, as it's much more convenient and economical. Good luck to you, and all the best.