It's kind of hard to judge scale in your photo, but what size it that screen? It sort of looks like #8...
I'm also confused...You say, "I think i need to do is find some #8 hardware cloth since tue dead bees and trash wont fall threw the regular screen". But bees don't fit through #8 (8 squares per inch), that's the whole point of using it.
If it is #8 you want, you are right, it's tough to find...If you have any Mom and Pop type feed stores, they can usually order it for you and have it in a week, maybe two at the most.