Recovering verilog source file from build files.. possible?

My .v Verilog source files were in a separate folder to the IDE build
directory, containing all the stuff generated in the build. Then I had
a hard disk crash, and (long story) everything *except* the .v source
has been recoverable, for one, relatively small project. Is there any
way that I can back build the source from the various files that the
IDE (Altera Quartus II) creates? Even a partial reconstruction would
help, ie. I'm prepared to do some manual fossicking. There isn't any
ascii listing that I can find, everything is either binary, or tabular
stuff such as pin data.