You are right about the wings and bonnet with the blended look. A Cobra should always show it´s mascular wings.
There is another way round the headlamp issue. Have you thought of "old school" In the 60´s most sports cars used 7 inch units behind glass/perspex covers to give them a streamlined look. e.g. Aston DB5, E type. GTO, etc.
You can take that route but using modern 7 inch units with L.E.D.s or projector lights or halo lighting. Some cost as little as £70 the pair.
Check out the Car Builder Solutions catalogue for a wide selection of front
and rear lights.
http://www.carbuildersolutions.com/CBS_Catalogue.pdf