With all the effort you guys have expended in posting why not try to source them yourselves??
All you need is a CAD file of an existing wheel (maybe one of you could sweet talk David K. to kick one loose to you or have Sandwich whip one up quickly)
From there a quick email to one of these companies, along with the CAD file, and expected quantities and you're in business.
http://www.smw.com/contents/catalog/id/16
http://www.magnesium-technologies.com/apage/8663.php
http://qhsunglow.en.alibaba.com/