radiator question

[chevyhed53]

I need to replace the radiator in my '56 as the fan mounting, with those plastic pieces, creates a leak. Previous owner rigged the setup in the photo. The piece on top of the radiator shell is obviously fabbed, but the top piece seems to be from some other factory setup, though not a truck, at least that I can find in any catalog. Anyone recognize that top piece so that I can get the right sized radiator? Other option, of course, would be to fit stock size radiator and take the fabbed pieces off. Any advice appreciated. Thanks and Merry Christmas!