Re: what to buy
At the present exchange rate(.71cents) ,your looking at approx Aus$18,300 to $28160.That puts you in a fairly good range to pick up a decent Aussie LHD car.The range of cars in Thunders link is pretty well on par for Aussie Mustangs & the plus is,they're here & you can view them!! You can see if there's any RUST that's going to chew up your money!
Parts & panels are avilable for all the models,but get dearer as the model year gets younger.
Been awhile since I've dealt with import charges & fees, but you'd be looking at anything from Aus$2000-$5000, depending on how you get the car over here.
Do you intend converting to RHD & do you doing most of the grunt work yourself?Daily driver......Show car........ or something in between?
After my rebuild I'm convinced it's better to hold out for a good solid platform to start with.Pick up a free parts manual from any of the American dealers (NPD,California Mustang ect) & check out the prices of the repo parts,do your sums then double it!!
When your in a hole........Stop Dig'n!!