Hello GringoBrazil9191,
No, there is no such thing as an emergency visa extension for a VITUR Tourist Visa.
My question to you is simply this, were you married here in Brazil? If so, and you carry your Marriage Certificate around with you at all times, just in case something ever happens, nobody can order you to leave the country under any circumstances less than being involved in a crime here and ending up deported. Even if you just overstay your VITUR Tourist Visa there isn't any real consequence to you whatsoever other than the small (R$8,25 per day) overstay fine.
I really can't understand any reasons that you might have for not applying for your VIPER Permantent Visa, but that's a personal decision that I certainly will not question, not my place to do that. You are aware that once you've been granted permanency that you can be outside of Brazil for up to 2 years at a time before you'd lose PR status, don't you?
Anyway, in your situation my advice would be simply stay as long as you like and pay the fine. The only possible consequence that you MIGHT suffer in the future is if you were to apply for a visa to some other country at some point in time. They MIGHT use the overstay fine and stamp in your passport as a reason to deny you a visa to their country, however even that is only a remote possibility.
Cheers,
wjw