Help finding bottom pivot

I'm afraid I don't know what pivot you need, exactly. I don't see a pivot in your photos. What I do see is the 23-409 connector block and 21-175 bracket, but these are compatible with a ton of different styles.

The most common pairing is probably going to be the 23-114, but this is not guaranteed. Seeing the original pivot, from this or another door in your house, would be the most helpful at this stage.