I have lost the smallest part on my Merlin. It is the screw/peg that goes into the small holes on the blue baseplate. Not the 1/4 screw that screws into the camera, but the one that goes in right next to it--that's probably 1/8" without threads that helps keep the plate from moving around.

Anyone know what this is called and where I could possibly get another one? No answer at Tiffen for a week. The part MIGHT cost $0.01. :)

I'm guessing this is what you're looking for? Steadicam | 8017435 Replacement Locating Pin | 801-7435 | B&H

And, sadly, while I wish parts like that cost $.01, welcome to the world of low-production, high end equipment. You get what you pay for though!