Like Phak1 I didn’t find them at Steele. I got them from the Filling Station but they’re probably the same everywhere. They went on without splitting but cracked in the middle after about 6 months. I also have modern style tie rod ends and the boots on those split too. They weren’t really stretched that much either. I think it’s an issue with the rubber compound used. Maybe there’s something that can be applied to them to soften them up a bit and avoid cracking.