That's quite a project. It's ambitious, but it sounds like you know what you're getting yourself into. Please do keep us updated, as I am sure many of us who are less adventurous would like to live vicariously through your experiences.
As for the parts, here are a few threads that may help you:
2.7L engine:
http://986forum.com/forums/showthread.php?t=21255
Parts Car:
http://986forum.com/forums/showthread.php?t=21133
Parts Car:
http://986forum.com/forums/showthread.php?t=20782
Best of luck!