Changing video Accent based on existing one

I seek a video production specialist to create derivative clips from an original piece of content. The target is to generate 3 replicas showcasing varied English accents. Specifically, the duplicate videos should feature a narrator affecting an American, Indian and Mandarin Chinese accent . While duplicating the original video's general narrative, tone and tempo; the new renditions must displace the standard accent with the designated vernaculars in a convincing manner. Technical proficiency is required to seamlessly re-dub the audio track onto the pre-existing video file utilizing industry-standard audio editing software. The subject material explores relatively benign topics suitable for all audiences. Please provide estimates and qualifications rather than contact information in your response. I wish to receive final product as fast as possible.