If you want them anyway, part number is 34111157038. They're surprisingly expensive though. Caliper pins need to be removed to get them out of course, but the caliper doesn't need to be disconnected from the brake line.

Not sure if these would contribute to the shaking but IME the pins will be a bit grubby so no harm in cleaning them up with a bit of wire wool & WD40. I've always given them a light coating of grease when reassembling and never had any problems