The old shutoff valve was bad.pulled it and found it missing the
metal washer.it had the 2 gaskets but no metal washer.i peeled the
gaskets apart but found no metal washer.so,where do you find one?
They tell you not to discard it after removal,my luck! if I knew it’s
size I’d atempt making one.how lmportant is the metal washer anyway?

Find some thick gasket material from the auto arts store and make a 3rd gasket.

Or perhaps someone who has some extra fuel injection pumps could supply you with one.
The bigger problem is if you get the bent tab on the Shutoff in the wrong place the Engine runs away and you need to do something like block the air off from the Engine to shut it off.

When you look inside of the Fuel Injection Pump you see a slot in a bend on the metal rack. That is not the slot for the shut off.

The attached picture is one with the ALDA cover on the top of the pump removed and the top of the picture is forward.
Note this is someone else's photo but I added the text.

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel