Yep, JMichael, it is for a 3-gang toggle switch...just like I said in the very first sentence of my replay.
Did a little more research today with fellow co-workers and a handful of suppliers and as far as anyone knows...they do not make a 3-gang GFIC device Raco/Bell WP cover (or your so named 3-gang Decora Switch cover).
Sorry I came up short for an answer. Maybe somebody else here on the forum can help you.
