Swap grills

[Kazco]

I have surfed the web looking for all ideas or suggestions for my 57. I found this listed on and was wondering if I need these parts too.

Here is what was posted regarding swapping a out a 57 grill for 55-56 grill:

Just make sure you use the 55-56 lower valance that connects to the grill, cause the 57 one is different. But everything should line up.
Let me add that you have to have the upper and lower bar for the 55-56 grill to work. The 57 upper and lower bar is different.

What is the upper and lower bar? If I indeed need these items in addition to a new grill, who sells them?

Thanks,

Mike