You can find older but "new" stock models like the LG 37" 1080p LCD at LG Parts or the Samsung 37" LCD TV via Samsung Parts USA .
Because this is no longer a standard manufacturing size, your best options are niche retailers or secondary markets: where can i buy a 37 inch tv
Sites like eBay often carry 37-inch models, and local liquidators such as Universal Hotel Liquidators sometimes have stock for under $100. You can find older but "new" stock models
Since 37-inch technology is often outdated (typically 1080p resolution rather than 4K), experts recommend looking at these nearby sizes for better features like : where can i buy a 37 inch tv