John,
There are 4 available on Oz EBay from the USA at the moment, item number is 300390726470. The 'buy it now' price is $37.88AUD with shipping to Sydney at $43.74 - which seems reasonable if it is a quality product IMHO. I'm interested, but haven't had any feedback about them as yet. The idea looks better to me than a mike stand in front of the amp when 'miking' to PA - I was surprised that The Shads didn't have something like this on Sunday night, they had stands. By the way, they say the regular price for these is $79 USD!
Regards