Miles, which part do you need, the bottom or top half (or both)? Do you have the "correct" 55 top section with the high center fin or the lower 54? The high fin will be very hard to find. I had one on my car at the National (my cars a 54) and I took it off for judging. I didn't put it back on after judging and decided to run the 54 for a while. A few months ago, a guy contacted me as his 55 had been vandalized and his ornament broken with a bat.
I sold him the one I had.
Why don't you have your ornament rechromed?