Thanks Pinky.
I found a list of PNG airstrips dated 2005 online about six years ago. It does not have (or I edited out while formatting the data) headings but it appears to be a list of name, latitude, longitude, identifier, a number from 1-4 (difficulty level?), runway headings, TDZE, length (m), slope (degrees I think), direction of slope, and some very short notes (ie Land 14 T/O 32, soft, slippery, rough, etc). Not sure how complete or accurate it is, but it appears to cover all areas of PNG.