So I did find a bit more, not certain what the rules are about URLs.
I will say that you can trace some of this stuff back to b. I'll give you a hint: some of the filenames in the ib archive URL are the same as they were on b. There is a b archive that allows you to search using filenames. I'll leave the rest to you.
The OP who knew her left a user name to contact, it's a deleted or privated account now but I'm investigating leads.