Let's game them out.
You submit the filing on time with the unnotarized affidavits. You immediately email all counsel telling them exactly what happened, and that you will be submitting replacement affidavits that are identical in all regards as soon as possible.
You might get sanctioned, but the judge won't kill the client.
Granted, you're going to need to demonstrate humility and a willingness to take your lumps, but you would have earned that anyway.
Fake the notarizations.
This is a bad option. The notarization is certifying a lie. That lie is being submitted as evidence against the defendants. It is a breach of so many professional obligations that it's hard to keep track of all of them.