Hi Geoff. Did the version of FTM you were using handle this "Splitting" onto diskettes natively? Do you know what version of FTM that was?
I don't know if this will work, but if you know the proper order of your nine .FBC files you can try concatenating them into a single file. I assume you're using a Windows computer now; you'd open a DOS window and use the COPY command. If the file names were TREE1.FBC, TREE2.FBC, etc. then the command would be:
COPY /B TREE1.FBC+TREE2.FBC+TREE3.FBC+TREE4.FBC+TREE5.FBC+TREE6.FBC+TREE7.FBC+TREE8.FBC+TREE9.FBC TREEFULL.FBC
'(Note the entire command is on one line, only three spaces in the command, NO spaces before/after the plus signs)
You'd end up with a new file called TREEFULL.FBC - then you'd need to install the FTM 2005 Starter Edition to read that, and convert it to a .FTW file which can then be imported into FTM2012 or Ancestry.com.
If that doesn't work, I'd suggest emailing the files to email@example.com
and see if they can do the conversion for you. They typically do that kind of conversion at no cost.