I know that my Lonestar drag axle is probably half the weight of the stock axle setup.  My +12 swing arm and axle are probably half the weight of the complete stock axle hubs, rotor etc...

JJ&A was quite a bit out on axles according to him about 2 weeks ago.  My buddy talked to him down in Oregon at the Redline open house dyno day.  He ordered his axle from Shearer.  A few guys on Ebay have them in stock. 

Aaron