The item I ordered from CountrySisters Shop on the 20th of last month arrived this afternoon. It took about 15 days from purchase, 2018/05/20~06/04, which means it arrived from the Czech Republic in two weeks.
I was looking forward to the release of CDs and DVDs on the official website, but it seems that Country Sisters' 45th anniversary concert was held on May 12, 2018.