these , from Tubus
http://tubus.com/en/spares-and-accessories
LM-1 mountingset for forks without eyelets
For mounting the Lowrider Tara, Ergo and Nova on rigid forks without eyelets with a diameter of 20 till 32 mm.
Art.-Nr: 72100 Alu / stainless steel srews
seem quite nice.