It would require a Certificate of Validation of your Canadian licence, for which you would need a Verification Letter from Transport Canada (basically letter from TC saying that you really do hold a licence); obtaining a PNG licence takes a while.
Only thing you may possibly be able to rent is a C206, but realistically you are going to be restricted to circuits at POM, as without either PNG experience or considerable training, no-one will let you loose to fly anywhere else. Wouldn't be a cheap exercise either.