You're asking someone who's not willing to run the brute-force he's been suggested for years, to prove he can extract mkey, salt and iteration from Bitcoin Core. It's not going to happen.
Are there any other methods besides brute-force in general? In my opinion, this is the safest and best option.
git clone
https://github.com/3rdIteration/btcrecover.gitinstall requirements
go offline
set everything correctly
date_variants.append(current_date.strftime('%Y-%m-%d'))
date_variants.append(current_date.strftime('%m-%d-%Y'))
date_variants.append(current_date.strftime('%d-%m-%Y'))
date_variants.append(current_date.strftime('%Y%m%d'))
date_variants.append(current_date.strftime('%m%d%Y'))
date_variants.append(current_date.strftime('%d%m%Y'))
date_variants.append(current_date.strftime('%Y/%m/%d'))
date_variants.append(current_date.strftime('%m/%d/%Y'))
date_variants.append(current_date.strftime('%d/%m/%Y'))
and forget about it for a while...