23.5 L x 79 H Double steel bi-fold closet door

We don't sell complete kits for these doors, but we do sell individual parts. You only need to replace what's broken.

For example, the 21-209 pivot bracket for your Benchmark door looks fine. The Benchmark door requires one bottom adjusting pin, which is the 21-002, and three spring loaded guide pins, which would be the 21-044. 

I can't see if you still have the 21-276 rubber bumpers in you track between the two doors. They help the doors to close together. That may be something to consider.