1. 3-Speed Automatic Transmission from a Porsche 914: This transmission can be adapted to the Beetle's engine and transaxle. It offers simple operation and can handle the power produced by the stock Beetle engine.
2. 4-Speed Automatic Transmission from a Volkswagen 01M Transmission: This modern four-speed automatic transmission from the newer Volkswagen models can be modified to fit into a Beetle without extensive modifications.
3. 3-Speed Automatic Transmission from a Volkswagen Type 3 Variant: This less common Automatic was a factory option on later model years of the Variant from which all the parts you would need could be taken
These are just a few examples, but they provide a range of options depending on your goals and budget. It's essential to ensure that the automatic gearbox, along with any necessary modifications, is installed correctly to maintain safety and longevity in your classic VW Beetle.