I ordered replacement ball joint dust boots off of eBay, seller was pidob79. They have a variety of sizes, after measuring the shaft on the ball joint with a caliper I bought the ones that were 15mm x 34mm and 28mm tall. They're a universal silicone dust boot that should be better than the cheap rubber that ripped do easily. You'll have to remove the cotter key and nut from the ball joint and separate it from the spindle with a ball joint tool to get the old boot off and new one on. The new ones don't use a retainer ring but should be okay as a friction fit. Hope this helps.