Just a quick google,
Forms
Click here to download the English language form Fiscal Code (English)
Click here to download some information in English Instruction for fiscal code (English)
Have a read through this
This blog post has some info, specifically this bit, sounds like it may be the correct process
“If you do not have a residence in Italy does not compile the field C, but go directly to the field D”
I don’t know how long it takes to get the code, and I hope you find an easier option
good luck
Maybe some Itallian locals may be able to help further
@B4db0ycs
@Nixator
@hbar.boi
@Benz83