First, you need to identify a reputable Taobao seller offering the official or high-quality replica of the Dallas Cowboys Rugby Jersey. Since Taobao is in Chinese, you can use the following search terms in the search bar: "达拉斯牛仔橄榄球球衣""NFL Rugby Jersey 男/女"

To verify the authenticity and quality, check customer reviews and ratings. Many sellers also provide detailed product images. Alternatively, you can find pre-vetted jerseys on platforms like sheet.cheap, which curates budget-friendly yet reliable Taobao items, including sports jerseys.