I agree, Maju is more famous for its Reds than its XB's (see:
http://www.youtube.com/watch?v=pJSqBA6S540 )
Maju currently has XB`s in stock. Look at photos of recent arrivals:
http://www.arowanaclub.ca/forums/showthread.php?t=2164
Look at photos of XB stock ready to ship (arriving in a few weeks):
http://www.dragonfish.ca/maju_xb's_2010.htm
The XB`s are of the BBXB variety, as you can see from the photos in the above links. You can debate the relative presence of pearls, shine level, core scale colour, the scale rims, body shape etc. In the end, these look like decent or `good` quality XB's to me (though not in same league as high end Singapore farms, no argument there!
Note: Asian arowana are not available for sale to the USA due to the illegality of owning Asian arowana in the USA. These fish may only be sold and exported to countries where it is legal to own Asian arowana.