Where to buy the script ?
I will run it in my language, not in english.
This forum script is one of SOOO SOOO MANY forum scripts.
This one is also probably HEAVILY hacked from the base source to get the custom posting requirements/signature restrictions and other features.
Use le google. Search for the one that has the larger community, and runs on a platform you are familiar with Linux/Doze PHP/Py/Ruby/Node.
And then hopefully the one that has the most options you require in the base source.