Lack of availability and recent vendor price increases have pushed the cost of the rectifier above the cost of an entire engine with a rectifier. Stinger will not sell this part until we can offer it to customers at a reasonable price. We recommend purchasing item 40-2803 (Kohler Engine CH270) for $395 or visiting a local Kohler parts dealer. Link: https://stingequip.myshopify.com/products/40-2803