I have played around with various low carb pie crusts and have decided that the real thing or nothing is the only way for me when it comes to a traditional short crust.
I have had good results with various kinds of ground nuts held together with butter. Similar to a graham cracker crust.
1 to 1 1/2 cups of finely ground almonds, pecans, walnuts etc.
2T to 3 T of melted butter
1 or 2 packets of artificial sweetener.
Mix and press into a pie pan. Bake at 350 degrees F for 8 to 10 minutes.
I use almond and fill it with a mixture of ricotta cheese, whipped cream, cinnamon and a couple packets of artificial sweetener to make a cannoli pie.
Not bad when I need a fix!