Even within Turkey you have to get Turkish delight from specific places otherwise it is shite. I can't imagine you would be able to find anything worthwhile abroad.
I've had a real one from a Turkish place called Gülloglö, which no longer exists, and it was incredible. It was like a block of rose water, covered in powdered sugar, and biting into it was a floral, sugary, explosion, especially combined with their harsh, dark, Turkish tea -- unbelievable.
I loved that place, and no idea how they went under.