Bottom Threaded Pivot

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

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 don't see a name of the company, the track is approx. one inch I would like to replace the whole tracking system

The wood gave way on the bottom of this bi fold door. Is there a bracket for the guide that will give support for this guide? This seems to be an easy fix if there was a metal plate that fit across the bottom of the door that would support the screw in support. Thanks for your help. Brad ... (cont.)

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!