Woohoo another Aussie

Well done on deciding to build a cab for your hubby (what a lucky bloke).
When I bought all my parts the exchange rate was terrible but it was still cheaper to get everything overseas.
www.therealbobroberts.com is where I got all the buttons, microswitches and a few joysticks. He is helpful and probably has the best price.
www.ultimarc.com for the ipac4, optipac and t-sticks - although
www.ozstick.com.au is the Australian distributor for them so may be cheaper to get locally.
www.oscarcontrols.com great spinners and huge contributor to BYOAC community (he helped with the designs for my cab)
If you get all the parts for both projects at the same time you will of course save on shipping costs, perhaps even get discounts on purchases depending on volume.
Build them at the same time so that they are finished together and you can have a big arcade party.
Cheers
-cdbrown