I have experience working with multibit wallets. Maybe I can help.
The wallet itself is lost. Dave Bitcoin has been working on it since early 2014, bruteforce of the entire range up to 10 characters has been attempted.
At one point, KeychainX found a false positive using the words i gave him, but it was just that - a false positive.
My only remaining options at this point are to handle this like solving the puzzles, but with my own wallet
