Here's mine for a 3 point Sparco harness. Great for guys that aren't hardcore like Dion.
Can be removed in seconds for rear passenger seating. Made with some heavy gauge U channel and 2 L brackets that bolt into the stock location. The eyelets come with the harness and 2 holes are drilled in order for them to be secured. There is aleady a spot in the rear sill for mounting the Y point. Just need to drill through the "carpet/covering".