If you can't convince RDC there's always GrabCAD. I've put some models on there; Baja Customs | CAD Models | GrabCAD
and I also sent a request to start an off-road design group in their "community groups".
Just figure out the groove dimensions, sketch the thread profile and sweep it. Save the sketch in your library for later use. Hole wizard is nice for quick callouts on a drawing but, but lacks detail on the model.