Posted: 27/04/2014 at 19:00
Justine; are you any good at applying concrete? I saw something in the West Indies that might work and be cheap-ish. Use a jack hammer to break up the current surface to use as hardcore. Pour on cement, preferably tinted to look like york stone/sandstone/whatever. When it is starting to set, using a suitable tool (of your own devising) scribe into the concrete to emulate the dips between real stone.