That's a real shame. I rode one of these briefly. Lovely riding machine.
I wonder if you can utilize one of these 60's/70's steel Campy hangers.
These were quite common on many frames that lacked the hanger built into the dropout.
This version indents toward the cogs, which might place your derailleur in the same position horizontally.
With the 2100's vertical dropouts, you would need to cinch it in place.
The backside is flat. You would, of course, need to saw off your existing hanger.
Only issue I see concerns your derailleur pushed a half inch aft.
Anyhow, these cost a bit used or new on eBay, when you can locate one.
I can send you a well-used one for ten bucks shipped. PM me if interested.
