Dennis,
I got a loaner (for at least a week) from MUSICLAB in Brisbane (Bowen Hills).
Just signed a piece of paper with my license and was good to go.
What would help you more is the fact that Billy Hydes also are Bose distributors and have good connections with Musiclink (based in Melbourne) who are the ones everyone really have to deal with.
The only reason I didn't buy it from Billy's is they required a $1000 deposit (on your Credit Card) that's refundable should you not like the system of course.
Musiclab did it all for free....
Give your nearest Billy Hydes a call - especially if you have room on your Credit Card.
I definitely think you'll find SOMEWHERE that is willing to Try-before-you-Buy.
Here's a Bose dealer locator Link.
http://www.google.com.au/url?q=http://www.bose.com.au/site/index.aspx%3Fpath%3Dsupport/Dealer_Locator&sa=X&oi=smap&resnum=1&ct=result&cd=2&usg=AFQjCNEEDMrcn0ItACMASQs8eY8P3Pbnhg
(sorry, hope that works - otherwise try Bose.com.au