Hi Keith
Do you mean my namesake's photography business? Last time I saw it, they were in the Morris Ave / Longfellow Rd shops (below):
I think they were in what is now the "Foot Clinic", but that would be twenty years ago. I believe the business was started by John Walker, the father. I was at Ravensdale Primary with John Walker, the son, who had taken over the business by the 1980s. He would be in his mid-60s now, so probably retired and sold up.