If you want to use the design files, or make your own, here is a DXF File: http://robs-blog.net/Files/60mm_Air_Variable_Parts.dxf
Rob’s Blog 23: Designing Parts for Air Variable Capacitor
If you want to use the design files, or make your own, here is a DXF File: http://robs-blog.net/Files/60mm_Air_Variable_Parts.dxf