Private Servers in 2021?

[okay lol]

So I think it's safe to say we probably won't get any fancy new hacks right away. It takes time, as is natural when there's a whole new client with a whole new array of anti-cheating precautions. With that in mind, is there any way we can make private servers of our own in the mean time?

Ideally, looking for a way I could use a version of the game from right before flash clients stopped working. Meaning, a version of the game where the old hacked clients that we used to use could still work on. Then, I'd be able to play mostly as if nothing happened, except I'd be alone (or maybe with a friend using hamachi). Is there any conceivable way to make this happen? Is there anywhere I can download a version of the game from back then and get it up and running for personal use?

Thanks in advance!