LF / Wanted - Cyclocross disc frame / full bike size 58-60

#crossiscoming so I need to transfer my gravel bike's parts to a cross frame. One issue: I'm having a hard time finding a good frame.

So here's what I'm looking for:

• Aluminium or carbon frame with a carbon fork
  
• Cyclocross geometry (otherwise I could just use my gravel bike)
  
• Stack > 590mm (preferably more than 600)
  
• Reach < 395mm (preferably less than 390)
  
• Preferably flat mount
  
• Internal cables if possible
  
• Costing up to € 400,- for a frame or a € 600,- for a full bike
  
• In the case of the full bike I don't care too much about the parts as I will probably sell those anyways.
  
  
  

Any tips or offers are very welcome,

Thanks!