Someone with AutoCAD skills and a 3-D Printer probably can make and sell them at a good profit. Like printing money  Until the Feds catch you selling suspect/unapproved parts. 
-Kirk Wennerstrom
President, Cessna 150-152 Fly-In Foundation
1976 Cessna Cardinal RG N7556V
Hangar D1, Bridgeport, CT KBDR
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