I’ve got just the thing for you. One of the most widely popular versions of Despecialized is NJVC’s Custom Blu-Ray set. They come with the movies, documentaries, bonus features, and menus. I’m not sure if they have nay for DVD’s, but here is the link to their thread anyway.
Here is the page for Despecialized .iso files: https://originaltrilogy.com/topic/NJVC-Custom-Blu-ray-Set-of-Harmys-Despecialized-Editions-now-available-on-Mega/id/57042/page/1
This person can help you if any of the links are dead: https://originaltrilogy.com/user/SnooPac/id/21956