Tough item to find...unique to the 955. They did use the same housing 4H7493 (955 only) and at least some if not all of the internals from the D4.
Good luck with your search.
I check this afternoon if am still have a 955-12a water pump
I have a water pump for 955-12a and parts on backis 4h7492 and in front 4h7495