You can get all the driveline components for an SVX/Legacy from Rockford Constant Velocity
http://www.rockfordcv.com/rcvrear.htm
They used to have a really nice catalog online, but now you have to call in.
They carry all the u joints, yokes, center CV boots, race, balls, and the center carrier bearing. The only thing they dont carry is the center CV housing
Their prices are good, I just hate having to call in when I should just be able to click "add to cart" and remain an antisocial hermit...