You can pretty much forget that. Companies are not going to provision a dedicated server for you on a trial basis, and certainly not with cPanel installed. I don't know of a single company that offers dedicated server trials.
Your budget is also ridiculously low, considering the cPanel dedicated server license is going to cost anywhere from $20-40/mo. Even at the $20 figure, you're talking about a dedicated server in the price range of $10-30/mo. And DDoS protection? You can't be serious. You would be lucky to find an old P4 or Celeron for that price, with no cPanel, no DDoS protection, etc. You're also not going to get instant activation on a dedicated server.
Are you actually looking for a VPS like in your other posts?