Create a new port for Macports
An easier way probably does not exists "they would have it listed on the site if there was a fast track" you are going to have to read and understand many of the things listed under MacPorts Development. It is a complicated system, you have to take the time to understand how it works, and what the rules and guidelines are for using and working with it. 

I am not currently a MacPorts developer but you could try asking / searching the archives for your question on MacPorts Mailing list, but I suspect if you do ask this question they are going to tell you the same thing I just did above. Either way if you want to get started developing ports for MacPorts getting started and having access to that Mailing list resource will help you go a long way.