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
Thanks very much for those options, I'd not seen either when I was looking. Will make enquiries. Agreed about the weirdness of the adapter, will look fugly. The 160mm will look tidier.
@finger_jockey started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported exclusively by donations. Consider donating a small amount regularly.
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