I would just hit that with a wire brush and call it good. if for some reason you do need any parts go to the virtual weber bullet website and you should be able to find schematics with part numbers for the various models and years. Also should find a chart with the codes on the lids daisy wheel that will tell you the model year. Tons of info there if you spend the time looking you will come up to speed real quick. Welcome to the weber community. Also if you order parts from them the service is great. I got mine in a few business days.
Backwoods Fatboy, 2 Ugly Drums, 22.5 wsm and 2 18.5 wsm's.