Thanks to everyone involved in solving this puzzle, especially perdita.
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This seems like it's going to be quite a big deal so it needs it's own thread so It doesn't clog the "OSR goes live in LA" thread (which is already about the mural AND the meeting)
What we have so far:
(IF ANYONE CAN DO HIGH RES SCANS THAT WOULD BE APPRECIATED)
One YZ booklet (1st one)
Another YZ booklet (2nd one)
Flyer in Ammo box given out in LA
As you can see two different line codes in two different YZ booklets, anyone with a different one should scan and post.
Also it would be worth it if others at the LA event check their flyer for different line codes too.
Edit: (Edited again) - and again
I have fixed an error in my first standardized graphic and have changed the scale slightly so it no longer looks stretched. Also fixed the spacing.
I have standardized these below using graph paper: (the first line is now 10 units high and 2 units wide the spaces are now 2 units wide)
Below, excellent minimalist version thanks to psyborgue, should be easier to work with in photoshop (at high zoom) as pieces will "click" into the uniform "grid".