Here is an update of the crusade for the CPU board PALs jedec:
I`ve got an access for the EIII that was probably "serviced" by EMU. As you can see on the pic, the IC27 has a sticker with IP374B EMU on it, and guess what - I was able to copy a jedec from it, as you can see on second pic, so it was not "protected". So, there is hope, that it is a possibility to find serviced EIII with replaced ICs on CPU board that is also not protected, and we can copy the JEDEC.
PM me if you need a IC27 jedec and also if you have the same stickers on the CPU board pals on your EIII )
Regards,
Kirill