Approach with caution

My friend has a nervous German Shepherd who is eight months old. She was rescued from Ireland and was pretty emaciated when adopted - despite being pregnant! She's slowly gaining weight, has had her pups, and has bonded brilliantly with her human family. She is great with other dogs, but is nervous with people. She ignores people on walks, but barks if they look at her or approach her. She's tried telling people to ignore the dog and not look at her, but to no avail. She has heard that you can get a T-shirt or tabard or something with 'Rescue Dog in Training, Please Ignore' or similar printed on it.

Anyone know where you can buy these? She has had one-to-one behavioural help and is coming on well, but she just needs people to ignore her when out on walks while her confidence is being built up.

Claire, Dogs Today