The broiler element you need for your KitchenAid oven model KEMS308SSS05 is indeed the WP9760774. This element is compatible with various KitchenAid and Whirlpool models. You can find it available for purchase on several online platforms, including Amazon and Repair Clinic. Here are some details about the part: Dimensions: Approximately 14" x 15" with 1-3/8" inserts. Material: High-quality stainless steel for durability and even heating. Installation: It’s designed for easy installation, and you can find step-by-step guides online