Gotcha.
It's twice the price of the whole bike though (+ it'd need a new wheel) so this is where I go back to thinking I'd rather just buy a whole new/used hardtail and leave the Inbred as a fat-tyre pub bike. Or maybe I just chuck the knobbies on and use it as a SS gravel bike.
It’s a 15mm bolt-thru, but otherwise it’s a modern fork that meets the majority of your requirements.