Thank you, chriskmurray. Yes, the fork has eyelets fore and aft of the dropout.

I was hoping to find options somewhere between $15 and $150 rather than at either end. I've done some general web searches and found options for racks fitting to rack bosses on the sides of the fork blades, which I don't have, or for attaching to the dropout and the fork crown, but I'd rather find something that natively attaches to the DO and the canti bosses, which seems both sturdier and more elegant to me.

The bike isn't actually new; it's a 1990 Schwinn High Plains.