I have a couple of 2" to 1.25" adapters that I would be willing to part with. Both are high quality aluminum alloy. Both are unused, and are in mint condition.
(**** SOLD thanks Dave ****)
The first one is of unknown origin, but was in my collection of Takahashi spare parts so likely came to me with a Tak FS-102, Sky 90, or Vixen 102-FL. It has a tapered 2" section (for secure fit in the 2" diagonal I guess) and is threaded externally on the top collar (for what reason, I have no idea.) It is also fully threaded internally. It has a single chrome plated brass set screw.
(**** SOLD thanks Vincent ****)
The second one is a William Optics 2" to 1.25 adapter. It has a chrome plated brass set screw and internal brass compression ring.
Your choice - $20.00 + $5.00 shipping in US.