Custom cPanel/WHM Plugin Request

Hi. I'm looking for a custom cPanel/WHM Plugin/addon that would allow my customers to use Nginx. This isn't anything speical right? And already offered by a couple of addons.. Well, I'd like the clients to be able to modify some settings within Nginx per domain/sub domain. For example "Block Bad User-Agents". "Enable TestCookie Nginx" and so on. Basically DDoS Prevention plugins, to prevent Layer-7 DDoS. Anyone interested in doing this? If yes, let me know the pricing.