I don't think anyone sells reproduction grills or parts of grills (except for the nose piece) for a 1954 Chevy truck.

I was quoted between $650 and $800 for chrome plating a '54 grill. This was for the triple plating process (copper, nickel, chrome).

Check out this topic:

http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=1;t=005881

Tim