Welcome to the forums, macmesser! Sorry to hear about your drive trouble.
If you've been syncing via Dropbox, just install Dropbox, wait for it to finish syncing, and then install 1Password. Your data will be detected automatically.
Otherwise, you can check the default location. Since you posted in the 1Password 3.8 forum, I'll provide the default location in 3.8 first:~/Library/Application Support/1Password/1Password.agilekeychain
If you meant to post in the 1Password 3.9 forum (the version of 1Password from the Mac App Store), the default location in 3.9 is:~/Library/Containers/com.agilebits.onepassword-osx-helper/Data/Documents/1Password.agilekeychain
I hope that helps. Please let me know.