He lost a lot of motivation by the end of that season. I totally agree the points results and stats don't always tell the story of the years racing. Massa looks totally demoralised these days as well. It will be good to see how quickly he gets back on the pace.
formula1.com website has a link for buying tickets and accommodation but Italy can't be selected yet (like a lot of other races) so I don't think they are on sale yet. There is a link to receive emails for news on the Italian GP at F1.com.
GT3076 0.82 turbine housing will get you there or thereabouts 300rwkw with the right supporting mods which you seem to have listed.
Check with some of the SAU traders or outside traders like MTQ, GCG or streettotrack.
You need a neo or late S2 CAS.
If you specify a neo CAS you will be fine. If you ask for a series 2 CAS you may end up with what you have.
Have you done a serious search?