WTB: TLC Arm SB-105 connector knob

I have some new TLC arms on the way that I want to attach to a couple of Nik. 105's. Does anyone have a couple of SB-105 connector knobs (TLC part 17754) that they don't need anymore (not the ball head kind)? I also need two dovetail mounts for the Aqautica handles (17550), although I would think there are fewer of those out of service. It would be best if they were in the US, as I am in Seattle, and it doesn't make too much sense to pay a fortune to ship them. Thanks