Theres this https://www.cnc-bike.de/product_info.php?products_id=17913
Then you just need a shim for the lower headset
Is that basically the same form as the Femur, looks no different
More eyelets, straight steerer and 1/3 of the price. But pretty similar, yeah.
Edit: I was comparing to the landyacht one, but everything except the steerer is still true
@swmlon started
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Theres this
https://www.cnc-bike.de/product_info.php?products_id=17913
Then you just need a shim for the lower headset