Yes, platinum bullion exists and is a popular investment-grade precious metal, typically produced as .9995 fine (99.95% pure) bars, rounds, and coins. Common forms include 1 oz coins like the American Platinum Eagle and various sized bars (1 gram to 1 kilogram) from private mints. 

Key details about platinum bullion include:

Popular options include 1 oz bars from refiners like PAMP Suisse, Valcambi, and Credit Suisse.