pretty much everything relys on a drilled hole there, your other option is
https://www.sjscycles.co.uk/forks/thorn-tandem-26-inch-disc-fork/
Yeah I was trying to think if there’s anything that doesn’t use the crown hole. I think I saw something that used axles/axle mounts and also Mid fork mounts but that seems stupid now I think about it plus it’s no help here.
@AlexD started
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pretty much everything relys on a drilled hole there, your other option is
https://www.sjscycles.co.uk/forks/thorn-tandem-26-inch-disc-fork/