There are other search engines besides Google. It may be worth your while going to www.yandex.com, then putting "Chester Folk Festival site:mudcat.org" in the search box. When I do that, threadid 171134 is the first result. Click on the three little dots and choose Saved copy to get the cache, it has two messages - better than none.

There is also www.bing.com, they also have a cache you can try.