Thread starter can choose wether they want replies or not

[bucks]

Hey all,

I have a classifieds area in my forum. Recently due to some members causing trouble i changed the settings so that only the thread starter could reply to their thread.

Is there a mod out there that would let the thread starter decide whether they wanted replies or not.

For example, the user would fill out the thread and when they click "post" they would be presented with a box that has two options;

1) Allow other users to reply to this thread
2) Do not allow other users to reply to this thread

Cheers for any help!

Thanks