Luck favors the foolish. My 2007 Keystone Outback 23RS had the track rollers fail, causing the track to be bent at the end and the pullout jammed in.
I found new hangers (rollers) at
https://jhusa.net/1125-door-hanger,
the 1125 is the exact measurements and for $15.00, I'll replace them both.
I didn't replace the track (100 series track, different lengths) because they can be a pain to remove. The screws are LONG and Philips heads easy to strip. I straightened them up, added extra screws forward and back of the cracks, and will keep an eye on them.
Fevco/Johnson makes an excellent product, this travel trailer was a rental, pulled out and in every summer weekend for 15 years. The only thing that went bad was back them the locking mechanism was plastic, new ones one metal. For that fact alone if yours look "ify" might be a good idea to replace them. Be well