I need parts for my bifold doors

Good morning,

Would you be able to help me out at getting parts for my doors

I have 4 set of doors that are 4 feet and 1 that is 5 feet.

I would like to buy the plastic caps for all of them.

the pins look like they are 5/16 and the swivel one are also 5/16 but are smaller at the bottom where the cap goes on.

I have included a few pic hopefully it will help you out on selecting the parts.

Regards