This seems what the hip brevet kids get
Racks & Decaleurs - Accessories
mount is the headset spacer stack
VO Decaleur Kits - Racks & Decaleurs - Accessories
rack supports the bag bottom
this one supports the bag from the rack
VO Randonneur Front Rack with Integrated Decaleur
the fork crown mounted housing stop. considered? its an arm coming up from the bolt hole thru the fork crown