How to play the Retribution campaign in Starcraft Remastered

Hey everyone, I have recently bought and started playing SC Remastered. I was inspired by a series of videos called Guidebound by a youtuber named Seanzen Gaming. I actually learned what the guides told him to do and tried to do them myself (and it was quite fun and interesting while not always efficient). Now, I know that Blizzard once used a 3rd party for creating the so-called Retribution campaign for SC1 (original not Brood war). How can one access them in 2025? I just want to play them for the experience.