Have you considered getting a different car? :^)
Love that car. It is far too valuable (having been repaired several times at great expense) to replace. We still have many miles to put on it, and it’s in great shape if we can just keep animals from running in front of it.
My car (bought used) came with deer whistles already installed, and we find that they really work. My driveway is a deer crossing. Normally the deer stop and stare and (often as not) charge right at you instead of getting out of the way. We noticed that when we were driving the car with the deer whistles, however, the deer would stop, stare and bolt the opposite direction. So, we decided to fit the other car with whistles. It seems to be working. And the whistles work for other animals too.