Hi, an outside hose valve is leaking, i have replaced the washers, but that didnt fix it, I want to replace all the parts that I have circled in the image. But I'm having no luck finding exactly what I need. Is it more common to replace the entire valve in the image rather than just the parts that connect to the top of the valve?
If its possible to replace the parts I have circled, does anyone know how to shop for the right parts? Thanks

https://imgur.com/3UFmbFk