I once spoke to the owner of a map shop in Adelaide who informed me that ONCs of PNG which covered bits of Irian Jaya were unobtainable and on a 'restricted' list. I have no idea if this is still (or ever was) the case.
Re my earlier post; Headed to the 'big smoke' tomorrow for an AFAP meeting and intend to drop into abovementioned map shop for the latest info.
Will post the results in due course.
I go back for a busmans holiday, which is in long term planning,
Wouldn't mind joining you on that
Chuckles.