About twenty dollars on E-bay. Works great and you do not have to mess with you stock seat covers. You can move it around on your back till you find that spot. Toss it in back when you don't need it.
Not to cool looking? Crawling away from your car is less cool looking. Your butt won't hurt even after a twelve hundred mile day! Also cheep on E-bay. Remember no one can see it when you are sitting on it.