Depending on the model, I guess, I just buy the whole rebuilt axle half shaft from NAPA stores for about $60 plus the old axle.
That means the entire axle for one side (half shaft) from the trans to the big nut at the end of the axle. Some models it even includes a new tension pin and/or a new punch nut for the end of the axle.
I live in Maryland, so YMMV, but I don't see how you can do better if it is available in your area.
I don't have a labor manual, but installing usually requires disconnecting the tie rod end (easy) and is probably about maybe a one hour each side project? I do them all the time since I have a bunch of Subies.
RedCrow