re. TIBS, digging through an Airport Facility Directory, I found a dedicated phone number: 1-877-4TIBS-WX. I gave it a try, and it does work. I used two simple voice commands and it then generated a recently updated recording specific to northeast Iowa, and it told me of nearby airmets for icing and IFR conditions (I checked aviationweather.gov, and that info was indeed current). TIBS seems like a relic, but I suppose if you didn't have an internet connection and didn't want to talk to a live briefer it could be useful.

re. PATWAS, it is no longer described in Aviation Weather Services AC 00-45G, so I'd guess it no longer exists, and the commercial exam question on it is badly out of date, just like the question about the Composite Moisture Stability Chart.