You can find 12oz white paper lid suppliers like WebstaurantStore, Amazon (Gusto, EcoQuality), Bio and Chic, Patek Packaging, and Alibaba, offering options for coffee cups, soup containers, or bulk purchases, often fitting standard 90mm sizes for various paper cup brands. Look for terms like "paper lid," "vented lid," "hot cup lid," or "soup cup lid," and check for compatibility with your specific 12oz cups.