Coconut pastry sounds unbelievably tasty. I love coconut and coconut custard, so that sounds like a great dessert. Maybe coconut with pineapple and call it a pina colada tart. I'll have to see if there are any recipes for anything resembling this.
My preferred pastry crust is puff pastry. It works for everything, sweet or savory. Plus, you can buy it in the freezer case. You can make it by hand, but why do that much work when the store bought kind works just as well?
I've also used a ground almond crust for a lemon tart that I made in an actual tart pan. It acts sort of like a graham cracker crust, so it works well in that pan.