Metal track
Hello,
Thanks for getting in touch! You may be able to use the 80-106 Sliding Glass Door Track to complete your repair but I cannot make any guarantees. You'll need to examine your existing track see if and how it can be removed to fit it in place. To get an idea on what the installation looks like, take a look at the video tutorial, "How to Replace a Sliding Glass Door Track", tagged below.
Another option would be to use the 80-102 Sliding Door Track Cover. To install this, you'll need to make sure there is no significant damage to the existing track rail. Any dents should be addressed prior to installation to prevent potential damage to the cover itself.
Both the track and the cover are only available in a 6' length. This means you'd need to purchase two tracks and cut them to cut them to size. Then, you'll need to install them to sit flush so that the door can continue to operate smoothly.