Have you tried using the 9.0.5 client libraries? I can't think of any reason they wouldn't
work (though I haven't needed to try them against a 9.1.3 server yet myself).
Building your own 9.1.3 libraries is trivial on Linux, but more of a challenge on Windows.
Hacking the client libs out of a 32-bit 9.1.3 binary install is tedious, but doable.
- V