Concrete paving flags 600x600x50 mm (Leavening YO17)

I am needing 8 to 10 paving flags for a garden project. Ideally the 2"/50mm thick type, but the thinner 38mm may suffice.

Concrete flags size: 600 x 600 x 50 mm
(2ft x 2ft x 2")
Hope someone can help out.
Thank you.