Articulated Magnifier Lamp Spacer and Bulb Retainer

I have an old magnifying articulated fluorescent lamp I trash-picked years ago. Instead of a clamp, it uses carriage bolts and wing nuts through the base to secure it through 10mm holes to a tabletop.

Somewhere along the line, the bit that goes under the table to act as the clamp for the wing nuts wandered off. So this model replaces it and being thicker, leaves less exposed bolt and looks nicer than a piece of scrap plywood when I'm fooling with cables under the desk.

The little clips th