Oops. You don't need to run dbassist again. What I meant was to reinstall the patch, which is the tar and the ./setup_stubs, and then go right back to trying to run sqlora8.sh. All dbassist is doing is creating the set of scripts, which you already have.
You could, possibly, copy over /ora8. If you can't get this to work it's worth a try. But if this isn't working then something is wrong, and it would be better to find it now. That's my theory, anyway. :)