ok, let me see if I got this.
the headlight ring is the "retainer ring". a circular shaped part that surrounds the headlight and holds the headlight into the bucket. it uses screws for this
https://www.summitracing.com/parts/o...SABEgK8s_D_BwE
the bucket part is the part that bolts or screws onto/into the hole in the fender where the headlight sits and it also contains the adjusting mechanism for the headlights. it is made up of more than a single part but is referred to as the bucket. it is screwed to the fender and there is a gasket between these parts.
https://www.cmwtrucks.com/product/55...cket-assembly/
the headlight bezel is the part that surrounds the headlight as trim once the bucket and headlight are a complete unit and screwed onto the fender hole.
the bezel in this case possibly has a raised section formed into it that can look like a separate part surrounding the headlight.
https://www.cmwtrucks.com/product/55...el-set-chrome/
it is this part that you are trying to duplicate without having to source a bezel for your possibly obsolete part. this way you can make the flat sheet portion and add the raised part. similar to a '63 chev single headlight which used a bucket, a headlight sealed beam, a retainer ring, a trim part around that ring which could have been round or square and also a bezel used to fill the whole area and cover up the workings behind the headlight.
https://www.lmctruck.com/1960-66-che...ngle-headlight
https://www.ebay.com/itm/123951085890