I believe the Royal Australian Mint do the right thing - pretty sure all the advertised mintages is what ends up getting produced, and some things are advertised as unlimited mintage (so whatever they can sell within whatever window they give themselves I guess).
Also, I had some luck getting images of early 20th century patterns from the Royal Mint Museum recently - it may be worth your while emailing them to see if they have an image of the 2002 Jamaica coins (and if they don't they would hopefully be able to confirm if they have any in their collection).