The obvious choices would be Caterham ($$$$!!!), a header for a focus or escape as it will be pointing the right direction and the primaries could be extended through the side of the bonnet, or use the ford manifold that is clean and much like a shorty header. Just clean and ceramic coat, then add a mandrel elbow at the head pipe to bring the exhaust outboard of the frame. New manifolds around under $100. It will also help keep the heat down under the bonnet compared to a thin walled header with the same finish.
A long tube header with the same bore spacing could be used with a new flange to fit the duratec and the primaries would need to be extended anyway. A long tube header for the older lima 2.3l might work.
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Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS
viewtopic.php?f=5&t=13225&p=134742Simple Spring select
viewtopic.php?f=5&t=11815LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12