Quoted from MeesterPieter:

the scans i made with a simple home scanner, so its in about 10 pieces for the complete playfield.
i tried if i could stich them together easily with photoshop but its still always a little off.
i'll share the files, no problem, though it might be nice if you share the results as well if you get any further with it
also i do still have a complete simpsons in good condition, which im not gonna tear down anytime soon, but if you need pictures of the spots that are usually worn then i can make those.
scans can be found on this dropbox link, dont wait too long since it eats a lot of gigs in my free dropbox
https://www.dropbox.com/sh/6yt3req9e23dac2/AAB0hfJApPIK5SvN8QNm9S1ga?dl=0