Delta interests won another last-minute, temporary reprieve on Friday in their efforts to block Southern California’s controversial $175 million purchase of about 20,000 acres of land in the fragile estuary.The deal had been expected to close as soon as next week, after the 3rd District Court of Appeal on Thursday lifted an order that had delayed the purchase for several weeks.But the court reinstated that order Friday after San Joaquin and Contra Costa counties, along with Delta farmers and environmentalists, pleaded for time to persuade the state Supreme Court to take up the matter.