I recently sold an LED headlight in near perfect condition from am 1199S for $800. I threw in some plastics and a DDA+ system that I had lying around. I don't think $1K is an unreasonable ask for the part. The bikes are out of cycle and a new one from the stealer-ship will run you well over $2K if they can even get them...
My main experience with Ducati was with the 916 - 998 series. So many years with so many shared parts. Many of the 749/999 & Multistroodle parts were the same. Not that way anymore, probably because Ducati learned their lesson and are also on more stable financial footing.