can’t find a fork with the right size

either they are too short (400mm) or too tall (485mm)

there’s nothing in the middle?
anything in the range 420-465 would be alright

important: they must be blade-shaped (no exotic)

Enve do a 470mm one but it’s very spendy.

I was after something like that for a while, couldn’t spot anything but the Exotics

You know they do the full monocoque version in 425mm and 470mm?
https://www.carboncycles.cc/?s=0&c=103&p=1252

Though not in stock anyway

enve priced out of this world

excotic too ugly, I’m building a monstercross

the fork of Koga Beachracer seems fine, but not sold separately 🙁

The Exotic Monocoque look the same as the Koga’s to me

It’s possibly worth checking out Triton cycles too, they have a load of weird rigid forks

Enve you say? 😉

https://bearbonesbikepacking.co.uk/phpBB3/viewtopic.php?f=9&t=16447&p=206339#p206339

They are lovely forks but I’m getting rid to make space for a new bike.