Joe Breda makes new Parker ejector hammers using CNC machinery. I don’t know the current pricing nor availability. The last email I had for him is
blackjackcash2@cs.com
I assume you mean the ejector “floating sear”. Very, very hard to find and then often priced like gold. You might be better off posting your WTB as a Parker Member not an Associate. Just sayin.
Last comment is: don’t underestimate the complexity of the Parker ejector system and how to fit a good replacement sear if you find one. Easy to ruin a replacement sear without an in-depth knowledge of the mechanism.