I just had a conversation with a knowledgeable someone the other day about BSA, and she told me that the BSA communications department is on-board for being transparent for abuse related claims.
Therefore, I think you and other BSA'ers whose abusers were not listed in the mass file dump, I think you should draft a letter directly to BSA asking about your specific case, and if they don't cough it up for you... then perhaps a civil liberties attorney can shake it loose for you.
PM me or email me and I can help you with the letter.
"There is a Catskill eagle in some souls that can alike dive down into the blackest gorges, and soar out of them again and become invisible in the sunny spaces... even in his lowest swoop the mountain eagle is still higher than other birds upon the plain, even though they soar." -- from Moby-Dick