I've never made a cover before, so I'll do my best. But I happen to have a Lagoon box in my closet. It's a little beat up on the edges, but I'm going to scan it and try to make a cover for the game.
I'll attempt to make a vertical and a normal one, if I can.
If all else fails, I'll give my raw scan of it to someone, should they want to make a cover.