[Partially Lost] Derek and Collin - Flash Animation

Following previous posts from me on r/flash and r/helpmefind on this subject, and having no response I think this post should be here.

Derek and Collin - Episode 12 - Trip to the store is a flashpoint animation that I found a year ago in a flash game pack. And so I decided to publish it on Youtube. I was very intrigued by this animation, and I tried to find information about this animation. The only thing is, I've been searching diligently for a year now and I can't find anything. Only episode 12 seems to exist on the internet currently. Having found episode 12, there are at least 11 episodes missing from this flash animation series.

The only things I found about this animation are the following:

A YouTube channel published the exact same eposide 4 years ago . I asked in the comments of the video to find out if the person behind the channel had more information on it, but I never got a response. I looked via the wayback machine at his channel in case other episodes had been posted earlier, but I found nothing.

An interesting thing, in the description of the video, it says that Derek and Collin are voiced by Andrew Duck. I couldn't find anything at all on Andrew Duck, I searched a lot on Newgrounds, Albino Blacksheep, Yandex etc but nothing came up.

In the comments of his video, we can see a comment from derekthedalek5089 saying "So you made an animated episode about me?" I said to myself maybe it’s the creator ? so I went to see his channel as well, also with the wayback machine but nothing.

I feel like I've been going in circles for a year now and it's driving me crazy. Despite hours and hours of searching, these episodes seem well and truly lost, and I haven't found anything other than the episode posted 4 years ago that I talked about above. I have almost no information on it. I don't know the date of creation, nor the name of the creator (maybe Andrew Duck?) nor even the website on which the series was published.

If anyone would be kind and patient enough to help me with these episodes, or at least maybe found the website they were published on, you would be a big help ! thanks for reading.