Metal Bi-fold door hardware

I don't know the maker of my metal doors, but the label mentions where to write for spare parts. My doors are missing some hardware, so I want to replace all doors with new hardware. My doors each have the three spring guide pins and the one threaded pivot pin. Can I replace them with the 21-001 and 21-007 pins? The dimensions on my existing pins are the same as those listed on you list. I also want to replace the pivot rod clamps and the bumpers.

Do the pins come with the caps, and does the rod clamp come with the screw? I also missing some top and bottom tracks. The top and bottom tracks are same type. Can I use your 21-404 track instead? The slot where the cap sits is 3/8" as well.

Thank you - Jesse