I am also not a Rollei specialist, but I was pointed to this from my Partner Wiese Foto in Hamburg, he is a Rollei repair service and he also did the adjustment for our HCam for the Hy6 Screen (which is normally too small and needs to be framed for the Hasselblad V Viewfinder adapter). I think the number for the screen is Typ 97069, it was a dedicated Hy6 screen.
If this is really the screen DHW has listed, then maybe they have gotten some more supply. My Info was, they are out of stock.
Regards
Stefan