Cat's got it, mainly. Products generally appear when there's a demand and if there issue is far and few between, there's little demand for products to solve the issue. Heck, collar bone injuries seem more common than rib and I know of few protective gear for that area.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
Identity theft is not Fun