bom: usb drive onn. 32GB USB 2.0 Flash Drive for PC and Mac - Walmart.com

x-acto blade #11X-ACTO Replacement Blades, No. 11, Carbon Steel Blade, Pack of 5 - Walmart.com

you're also going to need filament and a 3d printer (obviously)

use an x-acto knife to clean up and fine tune the parts so they slide good