Stop in for a cup of coffee

I need to fashion a mulching plate for my discharge shoot. May be out of expanded metal? so the fine leaves can leave the deck. Deere has mulching decks for my mower. I wouldn't buy one but I wonder what the design differences are other than blades? I know they take a different belt. May be a extra blade?
There might be baffles welded up in there, I managed to tear a couple of mine out, JD couldn't believe it. I was finding all the bumps and rocks when I first started mowing my property lol!