Pivot Blocks

Hello!

Your parts were made by Acme, which was bought out by Stanley. You can use our 23-113 23-112 spring loaded pins that will fit in your original pivot blocks. You would pry the pin out by sliding a thin putty knife under the collar. Your pivot block looks fine, but if you need to replace them, you can use our 23-407. The nylon roll guide is our 21-174. 

My apologies. In my first response, I gave you the wrong top spring loaded pivot part number. It should have been our 23-112 spring loaded top pivot. Regarding your pivot bracket, Stanley didn't pick it up. They use the 21-175 pivot bracket with the 21-092 for the bottom track and 21-175 with the 23-112 for the top track. See if the cross section of the 21-450 track matches yours so you can use the 21-175 pivot bracket.