I believe that Fictionwise is using HTML2lrf (part of kovidgoyal's libprs500 package) to automate conversion of some 16k titles. Perhaps you could suggest that to him, since you've got him talking.
Details
here and
here.
I'm sure any number of folks around here who use it could offer a command line that he could plug into the thing to do the conversion quickly and easily.
Good show following through with the gent.