Uniflame Grill Schematics I Need A Part For Our Grill?

I need a part for our grill? - uniflame grill schematics

My father bought me and my husband UniFlame a barbecue last summer. It was good for a while, but I noticed that the other days are burner parts rust and decay. The metal piece that covers the burner is very rusty. I searched the internet and can not find replacement parts. Who knows where I am going to get parts, or do we need a new grill?