Lost a small, new, replacement part, about the size of a lock fly, for a Milsurp gun years ago. Heard it hit the floor. I know it hit the shop floor.
The cost of the individual part was about the cost of the entire rebuild kit. Ordered the extra kit and installed the part. I searched through every dustpan of crap along with every shopvac load of stuff before tossing it out for years. Became a habit. Never found it.
Recently moved an arbor press that was mounted to a work bench. The same arbor press I was using to install the small part when I lost it. And there it was, the long lost part, in the dust under the arbor press. Even after finding it, it’s still a struggle not to check each dustpan for that part. You will find the missing screw. But only if you order a replacement. Don’t wait.