Thicker Option: You can use full-fat canned coconut milk for a thicker pie filling. But as mentioned do NOT use the coconut milk "beverage" sold in cartons for drinking. It's too thin and will not set up.
Graham Cracker Crust Options: Not all graham cracker crusts are dairy-free, but most are. We like
Arrowhead Mills Crusts. And though graham crackers usually contain honey, several crust varieties are strictly vegan. For gluten-free, dairy-free and soy-free, look for an option like
Mi-Del Gluten-Free Graham-Style Crust.