You can find PDFs of the official U.S. Reports at the Library of Congress (LOC) website (here’s a capture of today’s view of that LOC link at the Internet Archive).
More about U.S. Supreme Court Slip and Official Opinions:
You can read U.S. Supreme Court “slip” opinions online at the U.S. Supreme Court website, but these are neither final nor official opinions. Substantive and typographical edits are made before the opinions are published in the official U.S. Reports. Read the court’s disclaimer on their website regarding these “slip” opinions. (You can read their disclaimer below, i.e. as it appeared today.)