The safest and most reliable place to find these interfaces is through the official VirtualDJ Extensions Gallery
Download the .zip or .skin file for your chosen Rekordbox theme. rekordbox skin for virtual dj download hot
Virtual DJ has been in the performance DJ software game considerably longer than Rekordbox, which only added performance capabilities in 2015. However, Pioneer has been steadily closing the gap with new features and improvements. The safest and most reliable place to find