You can find it from specialized suppliers that cater to the vaping industry, chemical suppliers, or online retailers. These suppliers typically offer various concentrations and forms of pure nicotine, such as liquid nicotine or nicotine salts. It's crucial to ensure that you purchase from a reputable supplier to guarantee the quality and safety of the product. Additionally, be mindful of any regulations or restrictions regarding the purchase and use of pure nicotine in your area, as it is a highly potent and toxic substance. Always handle pure nicotine with extreme caution and follow proper safety protocols.