Honda Australia does stock or will get all replacement parts that they are still making in Japan, so you can order anything but it cost $$$$$. We can currently buy the 40 year anniversary model
for $3,500. But not street legal.
Second hand Z50J parts in OZ are like rocking horse SH*T, i've seen parts go for alot more then what u can buy new from Honda. No tuning parts (takegawa, g-craft, kitaco etc) are available in OZ all have to come via japan online stores. Most aussie's buy international from cmsnl.com or hondaminitrail.com because there cheaper even with postage added. So Lair, (I used to live 25mins from Budgewoi) you won't find many parts and they'll be dearer then USA! The only thing we can get is second hand import z50J's from Japan, they can't be ridden on the street, however, you can get an old bike, keep the frame with compliance plate (Needed for street legal riding) and put all the new parts off the jap model on it. (I've read in some threads that the USA won't let jap models come in due to pollution rules)
The only things bought new from Honda on my bike were the fork bushes, fork rubber seal/cap, swing arm bushes, headlight bucket & chrome ring, turn signals, mirrors. Everything else on my bike has been powdercoated or painted, the vinyl decals were made by a local sign shop.
Here's some build picks.
