Form to create new post?

[kpmedia]

For thread in a specific forum category, I want for the posts by the members to have specific info. Certain data is required.

I'm thinking this action would require either:
(1) Replace existing post template for this category with one that is form based.
(2) Insert form before posting, with the form submissions creating the new post automatically.

The form also needs all fields required, meaning no fill, no post.
Bonus would be to limit the member to only one post per thread in this category.

Does a plugin exist that does any of this?
Or template modification?

(Note to mods: Not cross-post, needing for both vB3 and vB4 forums. Thus posted in each section.)