Couroc was founded in 1948 and closed down in early 1990's. They were based in Monterey, California. They were best known for decorative inlaid trays and gilt highball glasses.
E & O insurance can be obtained from various companies. Do a search for the particular field that you are in and add E & O.
Your state insurance department is your best resource for...
Professional Liability Insurance or an Errors and Omissions policy provides coverage for liabilities that may arise from the practice of your profession.