give CST in sydney a call.. Composite Spars and Tubes
he has a strikerless series of tubes available.. made on a round mandrel but with extra carbon on two sides, making it an elipse.
http://www.compositespars.com/ a pic of the strikerless vs the standard is here
http://www.compositespars.com/images/A-class_beam_ends_web.jpgI guess you could ask C-tech in NZ and composite spars in melbourne.
