Do a quick search for the .doc name (Word uses the first couple words as default Name).I've found Word will Autosave , check for a file created within the last 10min as it sometimes will call it temp$$ or something similar.
There is an option in word 2k, tools>options>save, that creates a backup copy....somewhere. I'd try doing a search on the entire drive. It may be there.
It also saves as a hidden file; I don't think Search will pick that up unless you have Windows set to show hidden files. It would be a good idea to set the autosave feature so that you know where that backup document is going to be when you need it.