Or just mount it with P-clamps.

My Nitto/Rivendell Big Front Rack is mounted at the fork end eyelets and with p-clamps up above. A few companies make p-clamps for bikes, but the Nitto ones were a little small for my chunky early 90's chromoly fork, so I cut my own with tin snips and thin aluminum stock and scissors taken to an old tube. Some people prefer to skip the gasket and crank their metal clamps own directly to the fork.

I've had no problems with slippage or breaking, despite frequently carrying loads on a single side, including a single Ortlieb filled to the brim with books.

I was skeptical at first, but I'm sold on p-clamps after no issues over 4,000 miles on rough roads.

Do you also want rack advice? I give more than full marks to my Old Man Mountain front rack and the aforementioned Nitto. Both pricey, but bombproof.