As of my knowledge cutoff in September 2021, there is no official Azure Kinect DK plugin specifically designed for Unreal Engine. However, you may still be able to utilize the Azure Kinect DK with Unreal Engine by implementing custom functionality.
Here are a few options you can explore:
Custom Plugin Development: Since you mentioned that you tried writing a plugin but encountered issues with bone direction, you can continue exploring this route. Take a look at the official Azure Kinect Sensor SDK documentation for guidance on accessing skeleton data and controlling skeletal animation. You may need to carefully manage bone orientations and mappings to align them correctly with Unreal Engine's skeleton structure.
Third-Party Plugins: While the plugin you mentioned from Dark Slope appears to have been deleted, you can keep an eye on the Unreal Engine Marketplace and community forums for any new plugins or updates related to Azure Kinect DK. It's possible that new plugins may emerge in the future.
Custom Integration: Instead of using a dedicated plugin, you can consider integrating Azure Kinect DK functionality with Unreal Engine using a combination of native SDKs, such as the Azure Kinect Sensor SDK and the Unreal Engine C++ API. This approach would require more manual implementation, but it provides flexibility and allows you to customize the integration according to your specific needs.
Remember to refer to the latest documentation, forums, and community resources for any updates or new developments regarding Azure Kinect DK integration with Unreal Engine.