Concrete Pavingstone. (Langwathby CA10)

I am looking for either 1 full 2ft x 18inch (old style) or 1 full 45cm x 45cm paving stone. A half of an old style slab or 2 half’s of the metric version would be fine. I’m trying to finish of a path for my Mother, so that she can get into a largish flowerbed. Many thanks for reading. Can collect.