Hi D4Ni3L3!
You can try to solve your problem going here:
Keymap italiana per MorphOS
This italian keymap was made by prof Fulvio Peruggi and cover almost all key combinations on a common pc keyboard and it should work on an Apple keyboard too. This is my idea and I can't test it since I use a pc keyboard but I saw that keys are almost similar.
Download and install it in SYS:Devs/Keymaps and select it from System Settings/Keyboard.
On a pc keyboard key combination is ALT+@key and I've read that it's the same on an Apple keyboard. Try it and let us know =)

Ciao!