They don't manufacture them anymore.
even though it is listed...You might get lucky though!
This is one of those tips and tricks not mentioned in the maintenance manuals or if it is, is seldom made prominent enough: Gently tap the tube out of the engine case from the right side. Use something that won't damage the tube like a 2x2 or some such object.
I think I used a broken off paint paddle to cover the tube. (real soft wood the paint paddle is), then I tapped the broken off paint paddle that was resting on the breather tube, with a paint roller handle.
