Can you direct me to the correct shoe? Or do I need to replace shoe and bar
Thanks for posting! If you are referring to the 15-192 Certainteed pivot shoe, it is likely you'll need to replace the pivot bar itself. To determine the best possible replacement, may I please see a photo of your existing pivot bar?
I cannot make any guarantees, however, it is likely you have an older style Certainteed pivot bar. If that is the case, the easiest option would be to reuse the old metal cam from your existing pivot shoe.
They will come out of shoe if your spread it far enough to remove them, however, you'll just need to be careful not to spread the new shoe too far. You'll risk cracking the plastic at the bottom.
If you would like to pursue other options, we'd be more than happy to take a look. However, it would be best to see a photo of the old use if your are unsure.
If you've already shaved them down and they are still fitting tightly in the track, this shoe may not be the best replacement for you. You can of course try to shave them down a little more, but I cannot guarantee that will fit the issue.
Once you've tried shaving them down again, if they are still not fitting in the track properly, you may want to consider the replacements mentioned in the video below. Take a look and see what you think.