Source for aerobatic breather vent (or make your own?)

Allegedly the Aerobat oil breather goes a long way to eliminating that oily smear on the belly of the plane.  A standard breather elbow is ~$15, and the Aerobat is anywhere from $190 to $500. 

The only difference is a 2.75" tube brazed to the std brass fitting.

Has anyone found a source for a more inexpensive solution, or have you made your own?  According to things I've found on the web, it can be done by either brazing or silver soldering the tube to the fitting.

I just can't see paying more than $20 for such a simple contraption.  Ok; I might go $30...

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This from the RMJ-AERO website:

"Specifically designed for 65-100 horsepower Continental engines, RMJ-AERO produces a Continental crankcase breather originally used on the Cessna 150 Aerobat."

Sounds like dimensions will be the same for the A65.



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