I am posting this just in case fellow forum users run into this. A fellow forum user helped me w info on this repair. If you have a JLR 5.0 Liter Supercharged V8, and are dealing with the PCV diaphragm vacuum leak, don't be fooled by the dealership. They will try and claim the supercharger has to be removed to replace it, so they can charge 4-5 hours of needless labor. The repair is about a 500-600 dollar repair, it is a tight job, but can be done without removing the supercharger.

 

You can also find replacement PCV diaphragms on ebay, e.g. here.