H.P. Victor Instrument information needed

Can anyone give me the details, part no etc, of the tailplane incidence indicator fitted to the co-pilots panel on a Victor B.1.
Even better, does anyone have a spare one they would sell us? or know where I might get one?
I have tried to attach a link to a photo showing what we are after, and no, it’s not our panel in the pic, so if anything is incorrect, it wasnt us who put it there!!!!!
http://i235.photobucket.com/albums/ee38/_aida_/jewels0014.jpg
Thanks in advance.