rear fins on Elfs and Hornets

Are the rear fins on the Elf / Hornet just adapted 1100 pressings or are they unique ? If so who made them, how and where ?

Just something that occurred to me

Thanks

From what I've seen, the rear wings on the Elf and Hornet were pressings by Fisher and Ludlow. The exceptions were the Beach Car which had panels made specially and the early Pre-production cars which were made by BMC and are slightly different to the Production panels.

Kev