Welcome Michael! That's a nice redhead you picked up. The bars and even the grates look like they can be salvaged. Yes on replacing the burners as the cross burner is in 3 pieces. Lots of great info on this site and members who are willing to help, even if you don't have any experience in...
Here's a great post by Jon Tofte about stainless steel grate comparisons....
https://tvwbb.com/threads/stainless-steel-grate-throwdown-challenge-results.78876/
Of course rcplanebuyer for the bars and grates but I'm not sure if he still has grates for sale as I don't see it on his ebay store. If not then maybe Qulimetal on Amazon or maybe bbqparts.com...?
https://www.bbqparts.com/genesis1000.html