Wardrobe Door 5/8" Pivot Bushing

Looking to update the hardware for my old metal closet door. I have tried to use WD 40 and other lubricants to try to get the door sliding more cleanly, but I ultimately think all of the hardware could use replacing. I cannot seem to find hardware like this anywhere I look though. Help identifying i ... (cont.)

I am looking for the replacement posts for this bivalve door that has both an upper and lower tract. I have not been able to find. Most all of the new doors only have an upper track. Thanks for your help

Hello, I am looking for the parts in the first and fourth image, including the plastic thing that goes on the end and fits into the closet door tracks. I am hoping to refurbish my existing metal closet doors and need new hardware -- specifically the piece that goes on the end of these braces. I nee ... (cont.)