A limited number of new grilles have just arrived! They are totally SHOW QUALITY, mirrow-polished, stainless steel. Includes outer reinforcing band, vertical center bars, and special customer fasteners to attach to your outer shell.
Info from Brad\'s 41 to 46 site listed in links Judging by the info, that sounds right. I seem to recall production ended in 42 due to the war, stopping with BK (42 designation). The 45s used the same as 42 and then GM went with the D series in 46.