"AC-style" body...since there is a doubt that AC is in the equation.
The ones I saw did pick up details that were omitted on the Kirkham, but it would take a nutcase to find them.
The shape is fundamentally the same. 3104 as a template is not significant factor since it wasn't a Comp car; the Comp-S/C attributes were added by KMP.
Also the UK sourced bodies are 100% pounded and rolled, while components of the KMP are pressed.