I found one to replace my broken nozzle on eBay..GRADY WHITE BULKHEAD MOUNT WASHING JET - SPRAYER - SS STEM 3/8"-19MM #11-626. found it on Rusty Ron’s Marine Surplus eBay site. Here is the link to the part i purchased. https://www.ebay.com/itm/203370386033
Hopefully this is what you’re...