I found a film that Sebastian Shaw was in called “The Weather in the Streets.” I don’t know if there is enough good footage for close-up shots for jonh to use if he’s making a version of the Force ghost sequence with Shaw, but it could be useful.
Skimming through I only found 1 short scene of a mustachioed Shaw lying in a bed. So probably not the best choice for source footage. I’ve gone digging for good shots of Sebastian Shaw before, and I haven’t found any that fit the bill unfortunately. Another option is to manipulate an image like what jonh did for Obi-wan (iirc), but there aren’t many good still images of Shaw available either.
I’ll see what I can find of old Sebastian Shaw images.