I created a version of Angband 2.9.3 with custom "small" gfx for the Amiga much like the older "buggier" Moria. There is many improvements, IMHO, over Moria but not all gfx have been improved. There is extra sounds too. I never released anywhere else.
http://www.heywheel.com/matthey/Amiga/Angband.lhaLet me know if you like the changes (my sister is the artist in the family

).
Zangband on the Amiga is supposed to use a very awesome add on character set but I could never get it to work or the RTG stuff. I prefer regular Angband anyway as Zangband gets a little wild for my taste. The smaller gfx is more practical.