Order appropriate part from appliancepartspro.com. Incredibly, there was a video showing how to replace this minor part, which was really cool. Watching the video, the part where the tech removes the old end caps convinced me that I should also order a pair of the new style rail end caps just in case, and sure enough, one of the old style ones broke while removing, but I had the replacement right on hand. I love appliancepartspro.com, been buying parts from them for years, they have saved me a lot of money.