Got them from eBay. Lots of different sellers and different styles available. I tried a couple of different types before I found some I was happy with. Each bulb only costs about AU$1 so not a big deal to throw them away and try again if they're no good :P
Looking to order a K&N air filter (part no E-2997) for mine today. Will also finally look at getting some new headlight and fog light bulbs.