Well after a lot of local refactoring of the #MacPorts #snac Portfile to the point where I wasn't trusting some of the changes I had made to be worthwhile and was starting to get on the edge of creating new error messages.
I updated the Trac ticket with a version of the Portfile for 2.19 which at least functions on my local system:
https://trac.macports.org/ticket/66751
Maybe others can provide insights on how to improve it better?