According to manual- "pump s/n is stamped on a plug above the shift cable".
Check ebay. Check marine salvage yard. I have seen entire M2 pumps for $250 on ebay. Salvaged from sunk boat. No electrical parts, so not that big a deal.
No it’s broke one of the holes where special bolt goes in broke and the stop arm broke off with it. Other side is fine. Fresh looking Break. Maybe I hit something? Didn’t feel it if I did.