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SJS cycles carbon road fork is 2,5mm less/380mm .... but with iso mounts :
https://www.sjscycles.co.uk/forks/evolution-a647-carbon-road-disc-forks-700c-1-18-inch-ahead-for-32-mm-tyres/
140mm is possible with front iso with a tektro lyra adapter but looks a bit weird
enigma had a carbon fork that was 376mm but i cannot find it on their website. Maybe ask them:
It could be the version for sale here->http://www.fatbirds.co.uk/1767599/products/enigma-c-six-carbon-disc-fork---350mm-steerer.aspx
http://road.cc/content/review/143345-condor-fratello-disc-road-bike
160mm on this picture but yes maybe they changed it and you are in luck...
Ritchey has a fork that is 140mm post mount but it is 12.5mm longer: a-to-c 395mm
https://ritcheylogic.com/wcs-carbon-disc-cross-bike-fork