I can probably take this up, but there things to clarify:
Do you need an upgrade of the original extension to comply with the latest version (or even 2.x)? Or do you need an extension that is of similar functionality?
Since original extension is a paid extension, I dont think I can republish the code with MIT license (which is a requirement according to flarum bounty guidelines)?
Also I didnt buy that extension, so I dont have its source code, but it is possible to create something similar