Getting a Papua New Guinea Visa

Hi I am Irish and I am going to travel to Papua New Guinea I was wondering what was the story with getting a Visa I am just getting a one way flight into the country and then getting a boat to Indonesia and up through Asia. So I am wondering where should I get a Visa in Port Moresby also do we have to pay an entry fee??? I f no-one knows the answer who can I ring to find out?

National IRELAND (REPUBLIC OF) (IE)

Destination PAPUA NEW GUINEA (PG)

Passport (valid at least 6 months on arrival) required.

Visa required, which can be obtained on arrival for a touristic
or business stay of max. 60 days in any 12 months at:
- Jackson's Int. Airport; or
- Daru; or
- Kagamuga Airport, Mt Hagen
Fee: PGK 100.- for tourist visa and PGK 500.- for business
visa.
If entering at any other port of entry, an "uplift letter"
issued by the office of the Director-General is required.
However, it is recommended to obtain visa prior to arrival.

Passenger must hold:
- return or onward ticket; and
- sufficient funds to cover stay.

Source

So in short, you should be able to get a visa on arrival, BUT you must have an onward ticket.
This is unfortunately a standard requirement for all South Pacific countries, and a pain if you plan to leave overland.