As we spoke about on PM, I'm still working on it. The extra scan that you spotted will help speed things up. I'll at least resume work on it again. In some places the high res scan on localarcade is more detailed than the pictures I had so I will go over all the work I have done and see if I can refine it some.
AFAIK only TwoBits has the rights to print the Namco artowrk for Galaga, Pacman and such. So, besides their repros, you probably won't find any other (legal) shop that will sell them. Maybe some printers won't even print if for you if you send them a vector file of it.