Our local A/V suppliers just got these in yesterday
http://www.rodemic.com/accessory.php?product=pg2
at $88AU they are very afordable. It comes with two different sized
rubber 'grommet' mounts for 19-20 & 21-22.5 diameter microphones.
Yeah just saw that and the cheaper PG1 (http://aus.rodemic.com/accessory.php?product=pg1) $29 that will fit their other existing shock mounts and the video mics...
(http://aus.rodemic.com/images/accessories/pg1.jpg)