If you want to sell a body part to finance it, Munich Motorcycles have a weld on replacement spline. You need to sit down for the price $255.50 Au. I must of got one of the last ones out of Motobins $100.00 Au. After I ordered it I picked up a brand new OEM shaft off Ebay for $190.00 Au. I don't know where all the others Brick owners where, I got it with one bid. Rare as unicorn poo in Oz I've never seen one before.
Regards Martin.