Bi-fold Door Adjustable Bottom Pivot

Most replacement parts do not have the pivot caps. Therefore we can't use the standard replacement pivots. The size of the cap is 1 1/2 x 1 1/8. We will need eight top and four bottom pivots.

I am looking for this part, it is the one that is the main pivot, it bascically hold all the weight of the door, it is the one that the screw goes in to adjust the door in the opening, there is a insert in the to accept the adjusting scrrew, cant find it anywhere

Do you know what that piece is called, all together?

I was thinking maybe a metal plate across the bottom of the door, with a screw to replace the pin the first picture you can see where the door on the right has the pin in place as needed. The one on the left is the one that is missing the bottom pin also a close up of the pin

I need a bifold door top bracket that is wider than the 7/8 in brackets commonly available. The interior of my top channel is a full 1 inch. A 7/8 in top bracket slips out of the lower flanges of the track. Thanks!