Nissan SD22 Injection Pump

[Grizzly2023]

I have a Nissan forklift that has the SD22 diesel engine in it and I am in the process of rebuilding the Injection Pump (1014339270).
The problem that I have having is finding the diaphragm (1550201220). Without this then my rebuilding of the pump is a waste of time. I am not able to find a new part number for a diaphragm that replaces the original or even a different Injection Pump that could be used.

Question is to all of you:
1. Where can I fide a diaphragm Part Number 1550201220 or a new part number that is available.
2. An Injection Pump Part Number 1014339270 that has changed to a different part number so I can buy.

[waynosworld]

I recently read that someone on here I think found two of them in Florida as I recall, but I do not remember who/what thread, try a diesel injection shop.