Generator fuel divert valves

[Figment]

These valves with the square handles are (I'm fairly certain) not shutoff valves but divert valves, the lines scribed from the corner to the hub show the flow pattern.


They're weeping fuel into the bilge, and the packing nut at the stem won't tighten.


Might anyone here recognize these valves well enough to know if they're rebuildable or direct-replaceable?

 

[KnotYet]

Here are a wide selection of diverting valves, which is what you have there:
https://www.mcmaster.com/products/diverting-valves/

I particularly like the dual shutoff ones.