How can I get Modo Mods to work again?

A few months ago, I dropped my Moto Z Droid phone onto the ground. It seemed okay at first, but then I realized my Moto Mod wasn't working. I looked on the back of the phone to find that one of sixteen brass/copper (not completely sure) cylinders had fallen out. I was never able to locate it and have not been able to use any Moto Mods on the phone ever since. Is there any way I can be able to use Mods again?