My first car (bought in 1966 - one year after the convert was put in storage) was a 53 Coronet sedan. I would have remembered seeing a convert in the years since, but didn't, nor have I talked to anyone who had. I've searched the internet & only found 4 others. Two are in collections (a red on in AZ or NV and a blue one in FL?), an unrestored black one in CA and the body of one being parted out, forget where. There are undoubtedly more around (4100 were built), but it has to be a pretty rare car.