After doing a search on the net it looks like the item has been discontinued by several outlets so maybe you will have to look for a second hand dry stone wall pattern windbreak.
I was in the Range last night and they had some dry stone wall windbreaks. They arent on the web but they did have some in store, near the camping/fishing section. Pretty sure they were £29.99
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.