I couldn't find the topic where someone asked for a good attachment in the car. I came across Dara Holsters and the seem to have some good ideas, with or without screws, plus it does have a holster (trigger guard...)
Thank you for sharing this. Good vehicle mounted holsters are tough to come by. This is one of the best I've seen. My only reservation with it is that kydex is tougher on finishes than leather (i.e. I don't like kydex holsters; I prefer leather), but I understand why it's constructed the way it is.