Hi Jepprey!
You're absolutely correct about the 3 new parts.
You can get the 2-piece cooking grate set right from Weber.com here:
3400656
And, the drip pans right here:
6415
The Char-rail won't be on Weber.com anytime soon, so you'll need to call in to order that one at 1-800-446-1071. As noted in the schematic, it's part # 2401337, and it costs $6.25 USD.
