couple of retro clip rules
For what it's worth, here's how we used to pick clips:
Get your cleat position down perfect. Then select a clip that leaves 2-3mm space between the tip of the shoe and the clip. You don't want the clip touching the toe box of the shoe. Like a poster said, bend them to fit. To move them away from the shoe some more, shim them out with washers between the pedal and the clip.
I wear 42 shoes and used to ride with large clips. But I also rode with my cleat all the way back, putting my toe further forward.