Spent a lot of time looking for something like this:
But never found any. Styrofoam apparently is no longer eco-friendly and must be covered and contained or something...
Just ended up buying
8" diameter fenders. Picked them up cheap when Boaters World went out of business, but they cost around $45 apiece not on sale. Tied on with rope through the middle. It was the only solution to really feel like the hull was protected. If the ones from Stealth are like the ones in the pic, the peace of mind may be worth it.
Click da pic, if you want really big peace of mind...