Jerry:
I don't think I can help you much. I bought an after-market 57 grill some time back, and as you know they are the most expensive of the TF series. Mine seems to be pretty good as far as I can tell. It assembled just fine and the chrome is supposed to be triple plated. I haven't installed it yet, but I'm with you, it just wasn't worth re-plating mine. I bought it from someone in Nevada who couldn't use it anymore. so I can't tell you who the manufacturer/seller was. What I did do, is spray ZERO-Rust on the back side of the grill assembly, hopefully that will mitigate rust issues to a degree in the future.