[Face-research-list] request for stimuli which differ by one feature only

Dear all I am looking to set up a same/different face recognition task asking my participants to decide if pairs of faces are identical or if they differ by one feature (ie, all elements of the two faces are identical except the mouth). Does anybody have a set of face stimuli which has pairs of faces differing by only one feature (ie different eyes with all other features identical or different noses with all other features identical)? Thank you very much for your help Aisling Conway University College Dublin