Greetings,
The number "1" stamped on the head and Angle Lever were assembly numbers. Even if you were to locate another Lever with the same number, you will still need to "tweak" it to fit your head and press.
However, finding another part with the same number would keep the machine original with matching numbers.
Good luck with your search.
You might be able to still get one from Bill Cunningham. He is asking $45.00 for them.
Cheers,
Dave