$80 AUD = $44 US for alloy buckle
$160 AUD = $88 US for carbon buckle
$25 AUD = $13.90 US for a pair of keyballs. So refit your harness and trap (one trapeze) for about $100 if you go hi-tech, or about $60 otherwise. The full harness is right at $150, a bit high but subtract the $44 for the alloy buckle and you are right back in line with quality stuff here. Or you can refit both traps for less than $30. The buckle is 10" wide, also. Priced a 10" spreader bar lately? Mine in welded steel set me back $30 a couple or three years ago.
Prices seem REALLY reasonable....