Hello sselph, nice work!
Have you considered adding Amiga to your compatible systems?

There are a few resources online which catalogue Commodore Amiga box art and screen shots.

I would guess you’d have to use a similar technique to how you handle MAME name lookup because of the nature of Amiga adf files.

Useful resources to help, if you consider this:
http://www.exotica.org.uk/wiki/Amiga_Game_Box_Scans (wiki style, box art)
http://hol.abime.net/hol_search.php (large collection of 6616 entries, screenshots, box art)
http://www.lemonamiga.com (3518 entries, screen shots, title screens, some box art)
https://archive.org/details/Commodore_Amiga_TOSEC_2012_04_10 (xml file containing disk titles, meta data and old reviews – perhaps newer versions of these files are available in the same format?)

Thank you for your efforts