will blocks for 2013 and older sportsters work or do i need a specific 2014 and on version?

anywhere i can get these in Australia?

Should all be the same, it just bolts to the shock mount (lower) and sits against the swingarm.

Tamarak considered the best quality by most Sporty riders, you can get them through DK Customs in 1 or 1.5 inch.

I've got a set you can have for $50 if you want them

thanks mate, sent you a pm.