Just a guess, don't crucify me if I am wrong.
Try using the dd command at a console. I'd guess that
dd if=/dev/hda of=dev/hdb
would recreate it, or some permutation of that command. Read the manfile for dd and see what you can find out.
I'd do it myself, but right now I'm booted into Windows and don't particularly feel like searching the web for a http manfile repository. I'm sure you can do it just as easy as I could look it up.
Anyways, this is just a guess. I'm not terribly sure that it would work, it's just a guess. If it doesn't, you could always try to find disk cloning software on the internet, or just use Norton Ghost.